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<journal-meta>
<journal-id journal-id-type="publisher-id">Front. Psychol.</journal-id>
<journal-title>Frontiers in Psychology</journal-title>
<abbrev-journal-title abbrev-type="pubmed">Front. Psychol.</abbrev-journal-title>
<issn pub-type="epub">1664-1078</issn>
<publisher>
<publisher-name>Frontiers Media S.A.</publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id pub-id-type="doi">10.3389/fpsyg.2025.1609872</article-id>
<article-categories>
<subj-group subj-group-type="heading">
<subject>Psychology</subject>
<subj-group>
<subject>Original Research</subject>
</subj-group>
</subj-group>
</article-categories>
<title-group>
<article-title>Cognitive flexibility mediates the impact of emotion regulation strategies on negative emotions in preschool teachers</article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author" corresp="yes">
<name><surname>Gu</surname> <given-names>Changwei</given-names></name>
<xref ref-type="aff" rid="aff1"><sup>1</sup></xref>
<xref ref-type="corresp" rid="c001"><sup>&#x002A;</sup></xref>
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<contrib contrib-type="author">
<name><surname>Guo</surname> <given-names>Mengxin</given-names></name>
<xref ref-type="aff" rid="aff1"><sup>1</sup></xref>
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<contrib contrib-type="author">
<name><surname>Cui</surname> <given-names>Yeying</given-names></name>
<xref ref-type="aff" rid="aff1"><sup>1</sup></xref>
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<contrib contrib-type="author">
<name><surname>Yu</surname> <given-names>Feifei</given-names></name>
<xref ref-type="aff" rid="aff2"><sup>2</sup></xref>
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<contrib contrib-type="author">
<name><surname>Chen</surname> <given-names>Ya</given-names></name>
<xref ref-type="aff" rid="aff3"><sup>3</sup></xref>
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<contrib contrib-type="author">
<name><surname>Chu</surname> <given-names>Juanjuan</given-names></name>
<xref ref-type="aff" rid="aff4"><sup>4</sup></xref>
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<contrib contrib-type="author">
<name><surname>Zhou</surname> <given-names>Shuang</given-names></name>
<xref ref-type="aff" rid="aff5"><sup>5</sup></xref>
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<aff id="aff1"><sup>1</sup><institution>College of Preschool Education, Capital Normal University</institution>, <addr-line>Beijing</addr-line>, <country>China</country></aff>
<aff id="aff2"><sup>2</sup><institution>Suzhou Education Quality Monitoring Centre</institution>, <addr-line>Suzhou</addr-line>, <country>China</country></aff>
<aff id="aff3"><sup>3</sup><institution>Suzhou New District Experimental Primary School</institution>, <addr-line>Suzhou</addr-line>, <country>China</country></aff>
<aff id="aff4"><sup>4</sup><institution>Beijing National Day Jin Yuan Kindergarten</institution>, <addr-line>Beijing</addr-line>, <country>China</country></aff>
<aff id="aff5"><sup>5</sup><institution>College of Physical Education, Shanxi Vocational University of Engineering Science and Technology</institution>, <addr-line>Jinzhong</addr-line>, <country>China</country></aff>
<author-notes>
<fn fn-type="edited-by" id="fn0001">
<p>Edited by: Li Kaiyun, University of Jinan, China</p>
</fn>
<fn fn-type="edited-by" id="fn0002">
<p>Reviewed by: Tong Chen, Southwest University, China</p>
<p>Qian Cui, Liaoning Normal University, China</p>
<p>He Li, Northwest University, China</p>
<p>Lingfei Meng, Chongqing University of Posts and Telecommunications, China</p>
</fn>
<corresp id="c001">&#x002A;Correspondence: Changwei Gu, <email>gucw@cnu.edu.cn</email></corresp>
</author-notes>
<pub-date pub-type="epub">
<day>16</day>
<month>07</month>
<year>2025</year>
</pub-date>
<pub-date pub-type="collection">
<year>2025</year>
</pub-date>
<volume>16</volume>
<elocation-id>1609872</elocation-id>
<history>
<date date-type="received">
<day>11</day>
<month>04</month>
<year>2025</year>
</date>
<date date-type="accepted">
<day>04</day>
<month>07</month>
<year>2025</year>
</date>
</history>
<permissions>
<copyright-statement>Copyright &#x00A9; 2025 Gu, Guo, Cui, Yu, Chen, Chu and Zhou.</copyright-statement>
<copyright-year>2025</copyright-year>
<copyright-holder>Gu, Guo, Cui, Yu, Chen, Chu and Zhou</copyright-holder>
<license xlink:href="http://creativecommons.org/licenses/by/4.0/">
<p>This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.</p>
</license>
</permissions>
<abstract>
<p>This study aimed to examine how cognitive flexibility mediates the associations between emotion regulation strategies and negative emotions among preschool teachers in China. A total of 392 in-service preschool teachers in Beijing were recruited through random sampling. Participants completed validated questionnaires assessing cognitive reappraisal and expressive suppression (Emotion Regulation Questionnaire), anxiety and depression (SAS and SDS), and cognitive flexibility (Cognitive Flexibility Inventory). Structural equation modeling (SEM) and bootstrapping were used to test mediation models. The results revealed that cognitive reappraisal positively predicted cognitive flexibility, which in turn was associated with lower levels of both anxiety and depression. Conversely, expressive suppression negatively predicted cognitive flexibility, which indirectly contributed to increased negative emotions. However, the direct effects of expressive suppression on anxiety and depression were not statistically significant. These findings suggest that cognitive flexibility serves as a crucial psychological mechanism through which emotion regulation strategies impact mental health. This study advances current theoretical models by highlighting cognitive flexibility as a mediating factor in preschool teachers&#x2019; emotional experiences.</p>
</abstract>
<kwd-group>
<kwd>emotion regulation</kwd>
<kwd>cognitive flexibility</kwd>
<kwd>preschool teachers</kwd>
<kwd>anxiety</kwd>
<kwd>depression</kwd>
</kwd-group>
<counts>
<fig-count count="4"/>
<table-count count="4"/>
<equation-count count="0"/>
<ref-count count="39"/>
<page-count count="9"/>
<word-count count="5788"/>
</counts>
<custom-meta-wrap>
<custom-meta>
<meta-name>section-at-acceptance</meta-name>
<meta-value>Cognition</meta-value>
</custom-meta>
</custom-meta-wrap>
</article-meta>
</front>
<body>
<sec sec-type="intro" id="sec1">
<label>1</label>
<title>Introduction</title>
<p>Preschool teachers routinely engage in extensive emotional labor due to the nature of their professional roles, which involve continuous interactions with young children, colleagues, and parents, often requiring effective management of their emotional states (<xref ref-type="bibr" rid="ref21">Jeon et al., 2016</xref>; <xref ref-type="bibr" rid="ref37">Wang et al., 2019</xref>). Given these constant emotional demands, preschool teachers are susceptible to experiencing elevated levels of negative emotions, such as anxiety and depression, significantly impacting their psychological health and professional effectiveness (<xref ref-type="bibr" rid="ref20">Jeon et al., 2018</xref>). Emotion regulation strategies, particularly cognitive reappraisal and expressive suppression, play a critical role in shaping teachers&#x2019; emotional experiences and coping capacities (<xref ref-type="bibr" rid="ref14">Gross, 2024</xref>; <xref ref-type="bibr" rid="ref23">Lee et al., 2016</xref>). Effective emotion regulation can mitigate negative emotional experiences, thus preserving mental health and enhancing overall job performance (<xref ref-type="bibr" rid="ref3">Buruck et al., 2016</xref>; <xref ref-type="bibr" rid="ref27">Peng et al., 2019</xref>; <xref ref-type="bibr" rid="ref36">Wang et al., 2023</xref>). Recent research underscores cognitive flexibility as a key psychological factor that facilitates adaptive emotion regulation, allowing individuals to respond flexibly and constructively to changing emotional demands (<xref ref-type="bibr" rid="ref10">Gao et al., 2025</xref>; <xref ref-type="bibr" rid="ref29">Pruessner et al., 2020</xref>). Despite growing attention to emotion regulation among educators, the mediating role of cognitive flexibility, especially within the emotionally demanding context of preschool education, remains underexplored. As mediators in children&#x2019;s socialization, preschool teachers&#x2019; emotional regulation strategies, embedded in daily interactions, shape emotional cognition and foster prosocial behaviors. Therefore, examining how cognitive flexibility mediates the relationship between specific emotion regulation strategies and negative emotional outcomes among preschool teachers is both theoretically valuable and practically imperative.</p>
<p>Emotion regulation has increasingly become a critical area of investigation within emotional psychology, particularly in the context of occupational health. Emotion regulation strategies typically include cognitive reappraisal, which involves actively reinterpreting emotionally charged situations in less distressing ways, and expressive suppression, which involves consciously inhibiting emotional expressions (<xref ref-type="bibr" rid="ref11">Gross, 1998</xref>, <xref ref-type="bibr" rid="ref12">2015a</xref>, <xref ref-type="bibr" rid="ref14">2024</xref>). Prior studies have extensively documented differential outcomes associated with these strategies: cognitive reappraisal is consistently associated with better psychological health outcomes such as reduced anxiety and depression, whereas expressive suppression has typically been correlated with heightened emotional distress and poorer psychological well-being (<xref ref-type="bibr" rid="ref18">Haga et al., 2009</xref>; <xref ref-type="bibr" rid="ref25">Morrish et al., 2017</xref>). Previous studies found that teachers who frequently employed cognitive reappraisal reported lower job-related emotional exhaustion compared to those who habitually relied on expressive suppression (<xref ref-type="bibr" rid="ref33">Taxer et al., 2019</xref>), indicating the adaptive benefits of cognitive reappraisal in professional contexts.</p>
<p>Although substantial empirical evidence demonstrates the direct relationships between emotion regulation strategies and emotional outcomes, emerging literature suggests the importance of investigating psychological mechanisms that explain these associations. <xref ref-type="bibr" rid="ref31">Spiro et al. (1991)</xref> proposed cognitive flexibility theory, emphasizing multidimensional understanding and adaptive knowledge application in complex contexts. Cognitive flexibility&#x2014;defined as the capacity to adaptively shift cognitive sets, perspectives, or approaches when facing changing situational demands&#x2014;has recently gained prominence as a potential explanatory mechanism underlying adaptive emotional responses (<xref ref-type="bibr" rid="ref17">Guassi Moreira et al., 2022</xref>; <xref ref-type="bibr" rid="ref29">Pruessner et al., 2020</xref>). Research has shown cognitive flexibility to be positively correlated with emotional resilience and psychological well-being, emphasizing its role as an essential psychological resource in managing occupational stressors (<xref ref-type="bibr" rid="ref1">Aldao et al., 2015</xref>; <xref ref-type="bibr" rid="ref2">Bonanno and Burton, 2013</xref>). Studies highlighted cognitive flexibility as a significant predictor of lower depressive symptoms in educators, suggesting that cognitively flexible individuals are better equipped to navigate emotionally challenging professional environments (<xref ref-type="bibr" rid="ref6">Deveney and Deldin, 2006</xref>).</p>
<p>Nevertheless, despite the growing recognition of cognitive flexibility as a protective factor, limited research explicitly explores how cognitive flexibility mediates the relationship between specific emotion regulation strategies and negative emotional outcomes within the preschool teaching profession. Preschool teachers represent a distinctive occupational group characterized by intensive emotional labor, as they are frequently required to regulate emotions to maintain positive interactions and classroom climates (<xref ref-type="bibr" rid="ref27">Peng et al., 2019</xref>; <xref ref-type="bibr" rid="ref30">Purper et al., 2023</xref>; <xref ref-type="bibr" rid="ref38">Zhang et al., 2020</xref>). Previous studies have predominantly focused on direct associations between emotion regulation strategies and teacher well-being or job outcomes without adequately addressing underlying psychological mechanisms such as cognitive flexibility (<xref ref-type="bibr" rid="ref20">Jeon et al., 2018</xref>; <xref ref-type="bibr" rid="ref36">Wang et al., 2023</xref>). Thus, it remains unclear how cognitive flexibility influences the effectiveness of emotion regulation strategies&#x2014;such as cognitive reappraisal and expressive suppression&#x2014;in reducing negative emotions among preschool educators.</p>
<p>Although existing literature has significantly advanced our understanding of emotion regulation strategies and their influence on psychological well-being in various professional contexts, several critical research gaps persist. Firstly, previous research has predominantly emphasized the direct associations between emotion regulation strategies&#x2014;particularly cognitive reappraisal and expressive suppression&#x2014;and emotional outcomes such as anxiety and depression (<xref ref-type="bibr" rid="ref5">Cutuli, 2014</xref>; <xref ref-type="bibr" rid="ref7">Dryman and Heimberg, 2018</xref>). However, limited attention has been given to uncovering the mediating psychological processes that may elucidate why certain emotion regulation strategies effectively reduce negative emotions, whereas others do not. This limitation hampers the development of targeted psychological interventions designed to bolster emotional resilience and mental health among educators. Secondly, while cognitive flexibility has been increasingly recognized as a potentially critical mediator in the relationship between emotion regulation and emotional well-being (<xref ref-type="bibr" rid="ref6">Deveney and Deldin, 2006</xref>; <xref ref-type="bibr" rid="ref10">Gao et al., 2025</xref>; <xref ref-type="bibr" rid="ref26">Motevalli et al., 2023</xref>), empirical research explicitly testing this mediation model in the context of preschool teachers remains notably scarce. Preschool teachers constitute a unique occupational group with high emotional labor demands, making it particularly relevant and necessary to identify the mechanisms that promote adaptive emotion regulation in their professional environment (<xref ref-type="bibr" rid="ref27">Peng et al., 2019</xref>; <xref ref-type="bibr" rid="ref38">Zhang et al., 2020</xref>). Therefore, elucidating how cognitive flexibility mediates the relationship between emotion regulation strategies and negative emotional outcomes in this specific professional group represents a significant and timely research priority.</p>
<p>To address these gaps, the current study employs Gross&#x2019;s Process Model of Emotion Regulation (<xref ref-type="bibr" rid="ref13">Gross, 2015b</xref>), integrating it with recent theoretical advancements regarding cognitive flexibility as an adaptive psychological mechanism (<xref ref-type="bibr" rid="ref1">Aldao et al., 2015</xref>; <xref ref-type="bibr" rid="ref2">Bonanno and Burton, 2013</xref>; <xref ref-type="bibr" rid="ref29">Pruessner et al., 2020</xref>). Consequently, the primary objectives of the present research are twofold: first, to investigate the direct effects of cognitive reappraisal and expressive suppression on preschool teachers&#x2019; negative emotional outcomes (anxiety and depression); and second, to explore the mediating role of cognitive flexibility in these relationships. Specifically, we hypothesize that:</p>
<disp-quote>
<p><italic>H1</italic>: Cognitive reappraisal is hypothesized to positively predict cognitive flexibility among preschool teachers, whereas expressive suppression is expected to negatively predict cognitive flexibility.</p>
</disp-quote>
<disp-quote>
<p><italic>H2</italic>: Cognitive flexibility is hypothesized to negatively predict negative emotional outcomes, including anxiety and depression.</p>
</disp-quote>
<disp-quote>
<p><italic>H3</italic>: Cognitive flexibility is hypothesized to mediate the relationship between emotion regulation strategies (cognitive reappraisal and expressive suppression) and negative emotional outcomes.</p>
</disp-quote>
<p>The hypothesized models are as follows:</p>
<p>Model 1 (Anxiety): Emotion regulation strategies (cognitive reappraisal and expressive suppression) affect anxiety through cognitive flexibility (<xref ref-type="fig" rid="fig1">Figure 1</xref>). (1) the indirect effect of cognitive reappraisal on anxiety via cognitive flexibility (i.e., a<sub>1</sub>&#x202F;&#x00D7;&#x202F;b), and the direct effect of cognitive reappraisal on anxiety is c<sub>1</sub>&#x2019;; (2) the indirect effect of expressive suppression on anxiety via cognitive flexibility (i.e., a<sub>2</sub>&#x202F;&#x00D7;&#x202F;b), and the direct effect of expressive suppression on anxiety is c<sub>2</sub>&#x2019;.</p>
<fig position="float" id="fig1">
<label>Figure 1</label>
<caption>
<p>The hypothetical model of anxiety.</p>
</caption>
<graphic xlink:href="fpsyg-16-1609872-g001.tif">
<alt-text content-type="machine-generated">Diagram illustrating the relationships between Cognitive Reappraisal, Expressive Suppression, Cognitive Flexibility, and Anxiety. Cognitive Reappraisal and Expressive Suppression both connect to Cognitive Flexibility, which then connects to Anxiety. Direct paths from Cognitive Reappraisal and Expressive Suppression to Anxiety are shown with labeled coefficients \(a_1\), \(a_2\), \(b\), \(c_1'\), and \(c_2'\).</alt-text>
</graphic>
</fig>
<p>Model 2 (Depression): Emotion regulation strategies (cognitive reappraisal and expressive suppression) affect depression through cognitive flexibility (<xref ref-type="fig" rid="fig2">Figure 2</xref>). (1) the indirect effect of cognitive reappraisal on depression via cognitive flexibility (i.e., a3&#x202F;&#x00D7;&#x202F;b), and the direct effect of cognitive reappraisal on depression is c3&#x2019;; (2) the indirect effect of expressive suppression on depression via cognitive flexibility (i.e., a4&#x202F;&#x00D7;&#x202F;b), and the direct effect of expressive suppression on depression is c4&#x2019;.</p>
<fig position="float" id="fig2">
<label>Figure 2</label>
<caption>
<p>The hypothetical model of depression.</p>
</caption>
<graphic xlink:href="fpsyg-16-1609872-g002.tif">
<alt-text content-type="machine-generated">Diagram illustrating a mediation model where cognitive reappraisal and expressive suppression influence depression through cognitive flexibility. Paths are labeled \(a_3\), \(a_4\), \(c'_3\), \(c'_4\), and \(b\), highlighting relationships among variables.</alt-text>
</graphic>
</fig>
</sec>
<sec sec-type="methods" id="sec2">
<label>2</label>
<title>Methods</title>
<sec id="sec3">
<label>2.1</label>
<title>Participants</title>
<p>Sample size estimation for this study was guided by mediation effect testing requirements, using <xref ref-type="bibr" rid="ref9">Fritz and MacKinnon&#x2019;s (2007)</xref> method for mediation models. Ultimately, through simple random sampling, 400 questionnaires were distributed among 10 kindergartens in Beijing, and a total of 392 valid questionnaires were collected, resulting in an effective response rate of 98%. This sample size was sufficient for analyzing the complex mediation framework, and the study was approved by the ethics committee of the College of Preschool Education, Capital Normal University (<xref ref-type="fig" rid="fig3">Figure 3</xref>).</p>
<fig position="float" id="fig3">
<label>Figure 3</label>
<caption>
<p>SEM model showing the mediating effect of cognitive flexibility between emotion regulation strategies and anxiety. Solid lines indicate significant paths (<italic>p</italic>&#x202F;&#x003C;&#x202F;0.05), while dashed lines indicate non-significant paths.</p>
</caption>
<graphic xlink:href="fpsyg-16-1609872-g003.tif">
<alt-text content-type="machine-generated">Diagram depicting relationships between cognitive concepts and anxiety. Cognitive Reappraisal positively affects Cognitive Flexibility (0.336) and negatively influences Anxiety (-0.156). Cognitive Flexibility negatively influences Anxiety (-0.307). Expressive Suppression negatively affects Cognitive Flexibility (-0.240) with no direct effect on Anxiety.</alt-text>
</graphic>
</fig>
</sec>
<sec id="sec4">
<label>2.2</label>
<title>Rating scales</title>
<sec id="sec5">
<label>2.2.1</label>
<title>Questionnaire on emotion regulation strategies</title>
<p>The Emotion Regulation Questionnaire (ERQ) developed by <xref ref-type="bibr" rid="ref15">Gross and John (2003a</xref>,<xref ref-type="bibr" rid="ref16">b)</xref> was used with a total of 10 items, including two dimensions: cognitive reappraisal and expressive suppression. The questionnaire is scored on a seven-point scale from 1 (strongly disagree) to 7 (completely agree), with higher scores indicating more frequent use of emotion regulation strategies. In this study, the Cronbach&#x2019;s alpha was 0.852 (<xref ref-type="fig" rid="fig4">Figure 4</xref>).</p>
<fig position="float" id="fig4">
<label>Figure 4</label>
<caption>
<p>SEM model showing the mediating effect of cognitive flexibility between emotion regulation strategies and depression. Solid lines indicate significant paths (<italic>p</italic>&#x202F;&#x003C;&#x202F;0.05), while dashed lines indicate non-significant paths.</p>
</caption>
<graphic xlink:href="fpsyg-16-1609872-g004.tif">
<alt-text content-type="machine-generated">Diagram showing the relationships between cognitive reappraisal, expressive suppression, cognitive flexibility, and depression. Cognitive reappraisal positively influences cognitive flexibility (0.331) and negatively impacts depression (-0.144). Expressive suppression negatively impacts both cognitive flexibility (-0.248) and depression (-0.019). Cognitive flexibility negatively impacts depression (-0.380). A weak positive effect exists between cognitive reappraisal and expressive suppression (0.049). Solid lines indicate statistically significant paths.</alt-text>
</graphic>
</fig>
</sec>
<sec id="sec6">
<label>2.2.2</label>
<title>Mental health questionnaire</title>
<sec id="sec7">
<label>2.2.2.1</label>
<title>Self-rating anxiety scale (SAS)</title>
<p>This scale was developed by <xref ref-type="bibr" rid="ref40">Zung (1971)</xref> and consists of 20 items, each rated on a 4-point Likert scale the total score of the 20 items is multiplied by 1.25 and rounded to obtain the final anxiety score. A score below 50 is considered normal, 50&#x2013;59 indicates mild anxiety, 60&#x2013;69 indicates moderate anxiety, and 70 and above indicates severe anxiety. In this study, a cutoff score of &#x2265;50 was used to identify preschool teachers experiencing anxiety. Higher SAS scores indicate more severe anxiety levels. The Cronbach&#x2019;s alpha coefficient for this scale in the current study was 0.76.</p>
</sec>
<sec id="sec8">
<label>2.2.2.2</label>
<title>SDS Self-rating depression scale (SDS)</title>
<p>This scale was developed by <xref ref-type="bibr" rid="ref39">Zung (1965)</xref> and consists of 20 items. Each item is rated on a 4-point Likert scale based on feelings experienced in the past week. The total score is calculated by summing the item scores, and the final depression score is obtained using the formula: Depression Score&#x202F;=&#x202F;Total Item Score / 80. A score below 0.50 indicates no depression, 0.50&#x2013;0.59 indicates mild to moderate depression, 0.60&#x2013;0.69 indicates moderate to severe depression, and 0.70 and above indicates severe depression. In this study, the Cronbach&#x2019;s alpha coefficient for this scale was 0.841.</p>
</sec>
</sec>
<sec id="sec9">
<label>2.2.3</label>
<title>Cognitive flexibility questionnaire</title>
<p>The Chinese version of the Cognitive Flexibility Inventory (CFI) was used in this study (<xref ref-type="bibr" rid="ref35">Wang, 2016</xref>). The scale consists of 20 items rated on a 5-point Likert scale ranging from &#x201C;never&#x201D; to &#x201C;always,&#x201D; with six items being reverse-scored. The total score is obtained by summing the scores of all dimensions, with higher scores indicating greater cognitive flexibility. In this study, the total score was used to measure cognitive flexibility, and the Cronbach&#x2019;s alpha coefficient for this scale was 0.841.</p>
</sec>
</sec>
<sec id="sec10">
<label>2.3</label>
<title>Statistical methods</title>
<p>Mplus 8 software was used to construct a multiple mediation model through structural equation modeling (<xref ref-type="bibr" rid="ref28">Preacher and Hayes, 2008</xref>). Mediation effects were estimated using the bias-corrected percentile Bootstrap method with 5,000 resampling iterations to calculate 95% confidence intervals (CIs). A two-tailed test was conducted, with statistical significance set at <italic>p</italic>&#x202F;&#x003C;&#x202F;0.05.</p>
</sec>
<sec id="sec11">
<label>2.4</label>
<title>Common method bias test</title>
<p>In the questionnaire design and distribution process, this study employed proactive controls to mitigate common method bias, including anonymous response collection and the inclusion of reverse-coded items. Common method bias was evaluated using Harman&#x2019;s single-factor test, which extracted 13 factors with eigenvalues greater than 1. The first factor accounted for 25.44% of the explained variance, falling below the 40% critical threshold. These findings indicate that the study&#x2019;s data were not seriously compromised by common method bias.</p>
</sec>
</sec>
<sec sec-type="results" id="sec12">
<label>3</label>
<title>Results</title>
<sec id="sec13">
<label>3.1</label>
<title>Descriptive statistics and correlation analysis</title>
<p>The descriptive statistics and correlation analysis are presented in <xref ref-type="table" rid="tab1">Table 1</xref>. The results indicate that cognitive reappraisal is significantly negatively correlated with anxiety and depression, and significantly positively correlated with cognitive flexibility. Conversely, expressive suppression is significantly positively correlated with anxiety and depression, while showing a significant negative correlation with cognitive flexibility. Additionally, anxiety scores are significantly positively correlated with depression levels and significantly negatively correlated with cognitive flexibility. Depression scores are also significantly negatively correlated with cognitive flexibility (<xref ref-type="table" rid="tab2">Table 2</xref>).</p>
<table-wrap position="float" id="tab1">
<label>Table 1</label>
<caption>
<p>Analysis of demographic variables of participants.</p>
</caption>
<table frame="hsides" rules="groups">
<thead>
<tr>
<th>Variables</th>
<th align="left" valign="top">Background variables</th>
<th align="center" valign="top">
<italic>N</italic>
</th>
<th align="center" valign="top">Percentage</th>
</tr>
</thead>
<tbody>
<tr>
<td align="left" valign="top" rowspan="2">Gender</td>
<td align="left" valign="top">Male</td>
<td align="center" valign="middle">16</td>
<td align="center" valign="middle">4.08%</td>
</tr>
<tr>
<td align="left" valign="top">Female</td>
<td align="center" valign="middle">376</td>
<td align="center" valign="middle">95.92%</td>
</tr>
<tr>
<td align="left" valign="top" rowspan="4">Age</td>
<td align="left" valign="top">Under 20&#x202F;years old</td>
<td align="center" valign="middle">11</td>
<td align="center" valign="middle">2.81%</td>
</tr>
<tr>
<td align="left" valign="top">21&#x2013;25&#x202F;years old</td>
<td align="center" valign="middle">111</td>
<td align="center" valign="middle">28.32%</td>
</tr>
<tr>
<td align="left" valign="top">26&#x2013;30&#x202F;years old</td>
<td align="center" valign="middle">125</td>
<td align="center" valign="middle">31.89%</td>
</tr>
<tr>
<td align="left" valign="top">Over 31&#x202F;years old</td>
<td align="center" valign="middle">145</td>
<td align="center" valign="middle">36.99%</td>
</tr>
<tr>
<td align="left" valign="top" rowspan="4">Education Level</td>
<td align="left" valign="top">High school or secondary school and below</td>
<td align="center" valign="middle">54</td>
<td align="center" valign="middle">13.78%</td>
</tr>
<tr>
<td align="left" valign="top">Associate degree</td>
<td align="center" valign="middle">140</td>
<td align="center" valign="middle">35.71%</td>
</tr>
<tr>
<td align="left" valign="top">Bachelor Degree</td>
<td align="center" valign="middle">167</td>
<td align="center" valign="middle">42.60%</td>
</tr>
<tr>
<td align="left" valign="top">Master&#x2019;s degree or above</td>
<td align="center" valign="middle">31</td>
<td align="center" valign="middle">7.91%</td>
</tr>
<tr>
<td align="left" valign="top" rowspan="4">Teaching Experience</td>
<td align="left" valign="top">0&#x2013;1&#x202F;year</td>
<td align="center" valign="middle">132</td>
<td align="center" valign="middle">33.67%</td>
</tr>
<tr>
<td align="left" valign="top">1&#x2013;3&#x202F;years</td>
<td align="center" valign="middle">99</td>
<td align="center" valign="middle">25.26%</td>
</tr>
<tr>
<td align="left" valign="top">3-5&#x202F;years</td>
<td align="center" valign="middle">72</td>
<td align="center" valign="middle">18.37%</td>
</tr>
<tr>
<td align="left" valign="top">Over 5&#x202F;years</td>
<td align="center" valign="middle">89</td>
<td align="center" valign="middle">22.70%</td>
</tr>
<tr>
<td align="left" valign="top" rowspan="4">Position</td>
<td align="left" valign="top">Head Teacher</td>
<td align="center" valign="middle">132</td>
<td align="center" valign="middle">33.67%</td>
</tr>
<tr>
<td align="left" valign="top">Assistant Teacher</td>
<td align="center" valign="middle">161</td>
<td align="center" valign="middle">41.07%</td>
</tr>
<tr>
<td align="left" valign="top">Daycare Worker</td>
<td align="center" valign="middle">74</td>
<td align="center" valign="middle">18.88%</td>
</tr>
<tr>
<td align="left" valign="top">Administrative Staff</td>
<td align="center" valign="middle">25</td>
<td align="center" valign="middle">6.38%</td>
</tr>
</tbody>
</table>
</table-wrap>
<table-wrap position="float" id="tab2">
<label>Table 2</label>
<caption>
<p>Descriptive statistics and correlation analysis of research variables.</p>
</caption>
<table frame="hsides" rules="groups">
<thead>
<tr>
<th align="left" valign="top">Variable</th>
<th align="center" valign="top">M&#x202F;&#x00B1;&#x202F;SD</th>
<th align="center" valign="top">1</th>
<th align="center" valign="top">2</th>
<th align="center" valign="top">3</th>
<th align="center" valign="top">4</th>
</tr>
</thead>
<tbody>
<tr>
<td align="left" valign="middle">1. Cognitive Reappraisal</td>
<td align="center" valign="middle">5.15&#x202F;&#x00B1;&#x202F;1.08</td>
<td/>
<td/>
<td/>
<td/>
</tr>
<tr>
<td align="left" valign="middle">2. Expressive Suppression</td>
<td align="center" valign="middle">3.68&#x202F;&#x00B1;&#x202F;1.25</td>
<td align="center" valign="middle">0.06</td>
<td/>
<td/>
<td/>
</tr>
<tr>
<td align="left" valign="middle">3. Anxiety</td>
<td align="center" valign="middle">47.65&#x202F;&#x00B1;&#x202F;11.11</td>
<td align="center" valign="middle">&#x2212;0.39<sup>&#x002A;&#x002A;</sup></td>
<td align="center" valign="middle">0.11<sup>&#x002A;</sup></td>
<td/>
<td/>
</tr>
<tr>
<td align="left" valign="middle">4. Depression</td>
<td align="center" valign="middle">0.49&#x202F;&#x00B1;&#x202F;0.12</td>
<td align="center" valign="middle">&#x2212;0.48<sup>&#x002A;&#x002A;&#x002A;</sup></td>
<td align="center" valign="middle">0.20<sup>&#x002A;</sup></td>
<td align="center" valign="middle">0.45<sup>&#x002A;&#x002A;</sup></td>
<td/>
</tr>
<tr>
<td align="left" valign="middle">5. Cognitive Flexibility</td>
<td align="center" valign="middle">3.53&#x202F;&#x00B1;&#x202F;0.56</td>
<td align="center" valign="middle">0.54<sup>&#x002A;&#x002A;&#x002A;</sup></td>
<td align="center" valign="middle">&#x2212;0.32<sup>&#x002A;&#x002A;</sup></td>
<td align="center" valign="middle">&#x2212;0.45<sup>&#x002A;&#x002A;&#x002A;</sup></td>
<td align="center" valign="middle">&#x2212;0.67<sup>&#x002A;&#x002A;&#x002A;</sup></td>
</tr>
</tbody>
</table>
<table-wrap-foot>
<p><sup>&#x002A;</sup><italic>p</italic>&#x202F;&#x003C;&#x202F;0.05, <sup>&#x002A;&#x002A;</sup><italic>p</italic>&#x202F;&#x003C;&#x202F;0.01, <sup>&#x002A;&#x002A;&#x002A;</sup><italic>p</italic>&#x202F;&#x003C;&#x202F;0.001.</p>
</table-wrap-foot>
</table-wrap>
</sec>
<sec id="sec14">
<label>3.2</label>
<title>Measurement models and hypothetical models</title>
<p>To assess the measurement model, we conducted a confirmatory factor analysis (CFA), including variables such as cognitive reappraisal, expressive suppression, anxiety, depression, and cognitive flexibility. The CFA results indicated a satisfactory model fit: <italic>&#x03C7;</italic><sup>2</sup>/df&#x202F;=&#x202F;2.202 (<italic>&#x03C7;</italic><sup>2</sup>&#x202F;=&#x202F;284.97, <italic>df</italic>&#x202F;=&#x202F;84, <italic>p</italic>&#x202F;&#x003C;&#x202F;0.001), RMSEA&#x202F;=&#x202F;0.06, CFI&#x202F;=&#x202F;0.96, TLI&#x202F;=&#x202F;0.95, SRMR&#x202F;=&#x202F;0.05, indicating that the model structure was appropriate for further analysis.</p>
<p>Based on the correlation analysis, we developed two structural equation models (SEMs). Considering that anxiety and depression represent distinct psychological outcomes potentially influenced differently by emotion regulation strategies, we modeled them separately to achieve more accurate assessments. Model 1 examined the relationship between emotion regulation strategies and anxiety, with cognitive flexibility as a mediator. Model 2 focused on the relationship between emotion regulation strategies and depression, also mediated by cognitive flexibility. In both models, emotion regulation strategies were decomposed into two dimensions: cognitive reappraisal and expressive suppression, consistent with the ERQ questionnaire framework.</p>
</sec>
<sec id="sec15">
<label>3.3</label>
<title>Structural equation model path analysis</title>
<p>The SEM path analysis for Anxiety indicate that cognitive reappraisal has a significant positive effect on cognitive flexibility (<italic>&#x03B2;</italic>&#x202F;=&#x202F;0.627, <italic>p</italic>&#x202F;&#x003C;&#x202F;0.001). In contrast, expressive suppression has a significant negative effect on cognitive flexibility (<italic>&#x03B2;</italic>&#x202F;=&#x202F;&#x2212;0.426, <italic>p</italic>&#x202F;&#x003C;&#x202F;0.001). Additionally, cognitive flexibility shows significant negative effects on anxiety, with standardized coefficients of &#x2212;0.311.</p>
<p>The indirect effect of cognitive reappraisal on anxiety through cognitive flexibility was significant (<italic>&#x03B2;</italic>&#x202F;=&#x202F;&#x2212;0.195, <italic>p</italic>&#x202F;&#x003C;&#x202F;0.01), as was the direct effect on anxiety (<italic>&#x03B2;</italic>&#x202F;=&#x202F;&#x2212;0.294, <italic>p</italic>&#x202F;&#x003C;&#x202F;0.01). The indirect effect of expressive suppression on anxiety through cognitive flexibility was significant (<italic>&#x03B2;</italic>&#x202F;=&#x202F;0.132, <italic>p</italic>&#x202F;&#x003C;&#x202F;0.01). However, expressive suppression demonstrates a non-significant positive direct effect on anxiety, with a standardized coefficient of 0.060 (<xref ref-type="table" rid="tab3">Table 3</xref>).</p>
<table-wrap position="float" id="tab3">
<label>Table 3</label>
<caption>
<p>Results of SEM and bootstrapping for anxiety.</p>
</caption>
<table frame="hsides" rules="groups">
<thead>
<tr>
<th align="left" valign="top">Effect</th>
<th align="center" valign="top">Unstd. Coeff</th>
<th align="center" valign="top">Std. Coeff.</th>
<th align="center" valign="top">S. E.</th>
<th align="center" valign="top">C. R.</th>
<th align="center" valign="top">
<italic>p</italic>
</th>
</tr>
</thead>
<tbody>
<tr>
<td align="left" valign="middle">Cognitive Reappraisal &#x2192; Cognitive Flexibility</td>
<td align="center" valign="middle">0.336</td>
<td align="center" valign="middle">0.627</td>
<td align="center" valign="middle">0.037</td>
<td align="center" valign="middle">16.787</td>
<td align="center" valign="middle">&#x003C;0.001</td>
</tr>
<tr>
<td align="left" valign="middle">Expressive Suppression &#x2192; Cognitive Flexibility</td>
<td align="center" valign="middle">&#x2212;0.240</td>
<td align="center" valign="middle">&#x2212;0.426</td>
<td align="center" valign="middle">0.073</td>
<td align="center" valign="middle">&#x2212;5.804</td>
<td align="center" valign="middle">&#x003C;0.001</td>
</tr>
<tr>
<td align="left" valign="middle">Cognitive Flexibility &#x2192; Anxiety</td>
<td align="center" valign="middle">&#x2212;0.307</td>
<td align="center" valign="middle">&#x2212;0.311</td>
<td align="center" valign="middle">0.086</td>
<td align="center" valign="middle">&#x2212;3.636</td>
<td align="center" valign="middle">&#x003C;0.001</td>
</tr>
<tr>
<td align="left" valign="middle">Cognitive Reappraisal &#x2192; Anxiety (Total)</td>
<td align="center" valign="middle">&#x2212;0.259</td>
<td align="center" valign="middle">&#x2212;0.259</td>
<td align="center" valign="middle">0.048</td>
<td align="center" valign="middle">&#x2212;5.344</td>
<td align="center" valign="middle">&#x003C; 0.001</td>
</tr>
<tr>
<td align="left" valign="middle">Cognitive Reappraisal &#x2192; Anxiety (Direct)</td>
<td align="center" valign="middle">&#x2212;0.156</td>
<td align="center" valign="middle">&#x2212;0.294</td>
<td align="center" valign="middle">0.106</td>
<td align="center" valign="middle">&#x2212;2.779</td>
<td align="center" valign="middle">&#x003C; 0.01</td>
</tr>
<tr>
<td align="left" valign="middle">Cognitive Reappraisal &#x2192; Cognitive Flexibility &#x2192; Anxiety (Indirect)</td>
<td align="center" valign="middle">&#x2212;0.103</td>
<td align="center" valign="middle">&#x2212;0.195</td>
<td align="center" valign="middle">0.028</td>
<td align="center" valign="middle">&#x2212;3.630</td>
<td align="center" valign="middle">&#x003C; 0.01</td>
</tr>
<tr>
<td align="left" valign="middle">Expressive Suppression &#x2192; Anxiety (Total)</td>
<td align="center" valign="middle">0.107</td>
<td align="center" valign="middle">0.1</td>
<td align="center" valign="middle">0.026</td>
<td align="center" valign="middle">4.083</td>
<td align="center" valign="middle">&#x003C; 0.001</td>
</tr>
<tr>
<td align="left" valign="middle">Expressive Suppression &#x2192; Anxiety (Direct)</td>
<td align="center" valign="middle">0.033</td>
<td align="center" valign="middle">0.060</td>
<td align="center" valign="middle">0.070</td>
<td align="center" valign="middle">0.855</td>
<td align="center" valign="middle">0.392</td>
</tr>
<tr>
<td align="left" valign="middle">Expressive Suppression &#x2192; Cognitive Flexibility &#x2192; Anxiety (Indirect)</td>
<td align="center" valign="middle">0.074</td>
<td align="center" valign="middle">0.132</td>
<td align="center" valign="middle">0.026</td>
<td align="center" valign="middle">2.870</td>
<td align="center" valign="middle">&#x003C; 0.01</td>
</tr>
</tbody>
</table>
<table-wrap-foot>
<p><sup>&#x002A;</sup><italic>p</italic> &#x003C;&#x202F;0.05, <sup>&#x002A;&#x002A;</sup><italic>p</italic>&#x202F;&#x003C;&#x202F;0.01, <sup>&#x002A;&#x002A;&#x002A;</sup><italic>p</italic>&#x202F;&#x003C;&#x202F;0.001.</p>
</table-wrap-foot>
</table-wrap>
<p>Same analysis on depression indicate that cognitive reappraisal has a significant positive effect on cognitive flexibility (<italic>&#x03B2;</italic>&#x202F;=&#x202F;0.609, <italic>p</italic>&#x202F;&#x003C;&#x202F;0.001). In contrast, expressive suppression exhibits a significant negative effect on cognitive flexibility (<italic>&#x03B2;</italic>&#x202F;=&#x202F;&#x2212;0.429, <italic>p</italic>&#x202F;&#x003C;&#x202F;0.001). Furthermore,cognitive flexibility demonstrate significant negative impact on depression, with standardized coefficients of &#x2212;0.366.</p>
<p>The indirect effect of cognitive reappraisal on depression through cognitive flexibility was significant (<italic>&#x03B2;</italic>&#x202F;=&#x202F;&#x2212;0.223, <italic>p</italic>&#x202F;&#x003C;&#x202F;0.01), as was the direct effect on depression (<italic>&#x03B2;</italic>&#x202F;=&#x202F;&#x2212;0.032, <italic>p</italic>&#x202F;&#x003C;&#x202F;0.01). The indirect effect of expressive suppression on anxiety through cognitive flexibility was significant (<italic>&#x03B2;</italic>&#x202F;=&#x202F;0.157, <italic>p</italic>&#x202F;&#x003C;&#x202F;0.01), as was the direct effect on anxiety (<italic>&#x03B2;</italic>&#x202F;=&#x202F;&#x2212;0.255, <italic>p</italic>&#x202F;&#x003C;&#x202F;0.001) (<xref ref-type="table" rid="tab4">Table 4</xref>).</p>
<table-wrap position="float" id="tab4">
<label>Table 4</label>
<caption>
<p>Results of SEM and bootstrapping for depression.</p>
</caption>
<table frame="hsides" rules="groups">
<thead>
<tr>
<th align="left" valign="top">Effect</th>
<th align="center" valign="top">Unstd. Coeff</th>
<th align="center" valign="top">Std. Coeff.</th>
<th align="center" valign="top">S. E.</th>
<th align="center" valign="top">C. R.</th>
<th align="center" valign="top">
<italic>p</italic>
</th>
</tr>
</thead>
<tbody>
<tr>
<td align="left" valign="top">Cognitive Reappraisal &#x2192; Cognitive Flexibility</td>
<td align="center" valign="top">0.331</td>
<td align="center" valign="top">0.609</td>
<td align="center" valign="top">0.047</td>
<td align="center" valign="top">12.920</td>
<td align="center" valign="top">&#x003C;0.001</td>
</tr>
<tr>
<td align="left" valign="top">Expressive Suppression &#x2192; Cognitive Flexibility</td>
<td align="center" valign="top">&#x2212;0.248</td>
<td align="center" valign="top">&#x2212;0.429</td>
<td align="center" valign="top">0.050</td>
<td align="center" valign="top">&#x2212;8.545</td>
<td align="center" valign="top">&#x003C;0.001</td>
</tr>
<tr>
<td align="left" valign="top">Cognitive Flexibility &#x2192; Depression</td>
<td align="center" valign="top">&#x2212;0.380</td>
<td align="center" valign="top">&#x2212;0.366</td>
<td align="center" valign="top">0.064</td>
<td align="center" valign="top">&#x2212;5.744</td>
<td align="center" valign="top">&#x003C;0.001</td>
</tr>
<tr>
<td align="left" valign="top">Cognitive Reappraisal &#x2192; Depression (Total)</td>
<td align="center" valign="top">&#x2212;0.269</td>
<td align="center" valign="top">&#x2212;0.269</td>
<td align="center" valign="top">0.038</td>
<td align="center" valign="top">&#x2212;7.045</td>
<td align="center" valign="top">&#x003C; 0.001</td>
</tr>
<tr>
<td align="left" valign="top">Cognitive Reappraisal &#x2192; Depression (Direct)</td>
<td align="center" valign="top">0.049</td>
<td align="center" valign="top">&#x2212;0.032</td>
<td align="center" valign="top">0.082</td>
<td align="center" valign="top">&#x2212;0.391</td>
<td align="center" valign="top">0.696</td>
</tr>
<tr>
<td align="left" valign="top">Cognitive Reappraisal &#x2192; Cognitive Flexibility &#x2192; Depression (Indirect)</td>
<td align="center" valign="top">&#x2212;0.126</td>
<td align="center" valign="top">&#x2212;0.223</td>
<td align="center" valign="top">0.028</td>
<td align="center" valign="top">&#x2212;4.480</td>
<td align="center" valign="top">&#x003C; 0.001</td>
</tr>
<tr>
<td align="left" valign="top">Expressive Suppression &#x2192; Depression (Total)</td>
<td align="center" valign="top">0.075</td>
<td align="center" valign="top">0.075</td>
<td align="center" valign="top">0.047</td>
<td align="center" valign="top">1.593</td>
<td align="center" valign="top">0.111</td>
</tr>
<tr>
<td align="left" valign="top">Expressive Suppression &#x2192; Depression (Direct)</td>
<td align="center" valign="top">&#x2212;0.144</td>
<td align="center" valign="top">&#x2212;0.255</td>
<td align="center" valign="top">0.058</td>
<td align="center" valign="top">&#x2212;4.381</td>
<td align="center" valign="top">&#x003C; 0.001</td>
</tr>
<tr>
<td align="left" valign="top">Expressive Suppression &#x2192; Cognitive Flexibility &#x2192; Depression (Indirect)</td>
<td align="center" valign="top">0.094</td>
<td align="center" valign="top">0.157</td>
<td align="center" valign="top">0.023</td>
<td align="center" valign="top">4.028</td>
<td align="center" valign="top">&#x003C; 0.001</td>
</tr>
</tbody>
</table>
<table-wrap-foot>
<p><sup>&#x002A;</sup><italic>p</italic>&#x202F;&#x003C;&#x202F;0.05, <sup>&#x002A;&#x002A;</sup><italic>p</italic>&#x202F;&#x003C;&#x202F;0.01, <sup>&#x002A;&#x002A;&#x002A;</sup><italic>p</italic>&#x202F;&#x003C;&#x202F;0.001.</p>
</table-wrap-foot>
</table-wrap>
</sec>
</sec>
<sec sec-type="discussion" id="sec16">
<label>4</label>
<title>Discussion</title>
<p>The overarching hypothesis of the present study was that cognitive flexibility mediates the relationships between emotion regulation strategies (cognitive reappraisal and expressive suppression) and negative emotional outcomes (anxiety and depression) among preschool teachers. Using structural equation modeling, cognitive reappraisal was positively associated with cognitive flexibility, which, in turn, negatively predicted both anxiety and depression. In contrast, expressive suppression showed a significant negative association with cognitive flexibility, indirectly contributing to higher levels of negative emotions, although its direct effects on anxiety and depression were minimal and non-significant. These results provide robust empirical evidence supporting cognitive flexibility as an essential mediator in understanding how emotion regulation strategies impact preschool teachers&#x2019; experiences of negative emotions.</p>
<p>The most significant finding of this study is the mediating role of cognitive flexibility between emotion regulation strategies&#x2014;cognitive reappraisal and expressive suppression&#x2014;and negative emotional outcomes (anxiety and depression) among preschool teachers. Specifically, cognitive reappraisal positively predicted cognitive flexibility, subsequently leading to decreased anxiety and depression. This finding aligns with our hypothesis and previous research highlighting cognitive reappraisal as an adaptive emotion regulation strategy linked with improved psychological health and resilience (<xref ref-type="bibr" rid="ref7">Dryman and Heimberg, 2018</xref>; <xref ref-type="bibr" rid="ref32">Stover et al., 2024</xref>; <xref ref-type="bibr" rid="ref34">Troy et al., 2010</xref>). Moreover, present results indicates that cognitive reappraisal helps individuals reinterpret emotional experiences positively, thereby enhancing adaptive cognitive functioning such as cognitive flexibility. Thus, our findings extend existing knowledge by elucidating the underlying mechanism&#x2014;cognitive flexibility&#x2014;that contributes to the effectiveness of cognitive reappraisal in mitigating negative emotional experiences in an occupational setting characterized by intensive emotional labor.</p>
<p>Conversely, expressive suppression demonstrated a significant negative relationship with cognitive flexibility, indirectly contributing to increased anxiety and depression among preschool teachers. While the direct effect of expressive suppression on anxiety and depression was minimal and non-significant, the negative association with cognitive flexibility suggests a maladaptive cognitive pattern fostered by suppressing emotional expressions. Previous studies consistently report expressive suppression as a maladaptive regulation strategy associated with higher psychological distress (<xref ref-type="bibr" rid="ref15">Gross and John, 2003a</xref>,<xref ref-type="bibr" rid="ref16">b</xref>; <xref ref-type="bibr" rid="ref24">Moore et al., 2008</xref>). Our study provides additional insight by showing that expressive suppression may hinder the development or utilization of cognitive flexibility, thereby indirectly exacerbating negative emotional experiences. This finding extends existing literature by emphasizing cognitive flexibility as a critical pathway through which expressive suppression can negatively influence teachers&#x2019; emotional health and underscores the importance of addressing such maladaptive strategies within teacher training and psychological interventions.</p>
<p>Additionally, the significant negative association between cognitive flexibility and anxiety and depression further highlights cognitive flexibility as an essential psychological resource for preschool teachers. This result is consistent with recent empirical studies identifying cognitive flexibility as a core psychological strength linked to resilience and emotional well-being in occupational contexts (<xref ref-type="bibr" rid="ref10">Gao et al., 2025</xref>; <xref ref-type="bibr" rid="ref22">Karbalaie et al., 2021</xref>; <xref ref-type="bibr" rid="ref26">Motevalli et al., 2023</xref>). Our findings underscore cognitive flexibility&#x2019;s protective function, suggesting that educators with greater cognitive flexibility may adapt more effectively to emotional challenges inherent in preschool environments. Thus, this study expands current theoretical frameworks by specifically validating cognitive flexibility as a mediator, enhancing our understanding of its protective mechanisms against negative emotional outcomes.</p>
<p>Finally, the differential effects of cognitive reappraisal and expressive suppression observed in this study emphasize the importance of distinguishing between emotion regulation strategies when designing interventions for teachers&#x2019; psychological health. Our results indicate that interventions aimed at promoting cognitive reappraisal and enhancing cognitive flexibility might significantly reduce negative emotions and bolster emotional resilience among preschool teachers. In contrast, efforts to discourage reliance on expressive suppression, given its potential negative impact on cognitive flexibility, might prove beneficial in protecting teachers&#x2019; mental health. Therefore, the current findings contribute practically by highlighting targeted areas for intervention, advancing both theoretical insights and evidence-based recommendations for improving preschool educators&#x2019; emotional well-being. Incorporate relevant courses or scenario-based simulations into pre-service teacher training programs to compare the effects of cognitive reappraisal versus expressive suppression. Pair these interventions with individual assessments using standardized scales, and establish dedicated funding to support kindergartens in introducing psychological supervision services.</p>
<p>Overall, our findings align closely with prior literature demonstrating cognitive reappraisal&#x2019;s beneficial role and expressive suppression&#x2019;s maladaptive impact on emotional health (<xref ref-type="bibr" rid="ref4">Chervonsky and Hunt, 2019</xref>; <xref ref-type="bibr" rid="ref5">Cutuli, 2014</xref>; <xref ref-type="bibr" rid="ref7">Dryman and Heimberg, 2018</xref>; <xref ref-type="bibr" rid="ref15">Gross and John, 2003a</xref>,<xref ref-type="bibr" rid="ref16">b</xref>). However, subtle differences emerged concerning the direct effects of expressive suppression. Unlike certain previous studies reporting direct, robust associations between expressive suppression and elevated anxiety and depression (<xref ref-type="bibr" rid="ref7">Dryman and Heimberg, 2018</xref>; <xref ref-type="bibr" rid="ref8">Ehring et al., 2010</xref>; <xref ref-type="bibr" rid="ref15">Gross and John, 2003a</xref>,<xref ref-type="bibr" rid="ref16">b</xref>), our results showed minimal and statistically non-significant direct effects. We propose several possible explanations for this discrepancy. Firstly, our study explicitly incorporated cognitive flexibility as a mediator, utilizing structural equation modeling (SEM) to assess indirect relationships rather than solely focusing on direct associations. Previous studies primarily employed direct-effect models without explicitly evaluating mediation pathways. Therefore, our approach may have captured nuanced indirect influences previously overlooked, reducing or obscuring the direct relationships between expressive suppression and negative emotional outcomes. Secondly, the methodological rigor and statistical power achieved through a relatively large sample size (n&#x202F;=&#x202F;392) and the application of advanced analytical methods (SEM with bootstrapping) may have provided greater accuracy and reliability in detecting indirect mediation pathways. Previous studies with smaller samples or simpler analytic approaches might have amplified or inflated the direct effects of expressive suppression.</p>
<p>Despite its contributions, several limitations should be acknowledged in the current study. Firstly, the cross-sectional nature of our research restricts causal interpretations regarding the relationships among emotion regulation strategies, cognitive flexibility, and negative emotional outcomes. Although our structural equation modeling provided robust evidence of mediation, longitudinal designs would further clarify the causal directions and temporal dynamics between these variables. Future studies employing longitudinal or experimental approaches could offer deeper insights into the stability and causal sequence of the observed mediation effects. Secondly, our data relied exclusively on self-report questionnaires, potentially introducing response biases such as social desirability and common-method variance. Future research could incorporate multi-method approaches, including observational assessments or physiological indicators of emotional regulation and stress responses, thereby enhancing methodological rigor and reducing potential biases inherent in self-report measures. Additionally, this study was conducted with preschool teachers in Beijing, which may limit the generalizability of findings to broader teacher populations or cultural contexts. Women accounted for 95.92% of the sample, which aligns with the gender distribution in the preschool education sector. The age range was concentrated between 21 and 35&#x202F;years old (comprising 60.21% of the sample), and teaching experience spanned from less than 1&#x202F;year to over 5&#x202F;years, consistent with the youthful characteristics of kindergarten teachers in Beijing. However, the geographical scope was limited to Beijing, which may restrict the applicability of the findings to teachers in rural areas or other cities. Thus, future studies should examine similar mediation models across diverse cultural contexts and occupational groups to determine the extent to which these relationships generalize or differ cross-culturally. Finally, although cognitive flexibility emerged as a significant mediator, other psychological variables (e.g., emotional intelligence, resilience, social support) might concurrently mediate or moderate these relationships. Future research could explore these potential variables within a comprehensive model to deepen our understanding of the multiple pathways and boundary conditions influencing preschool teachers&#x2019; emotional health.</p>
</sec>
</body>
<back>
<sec sec-type="data-availability" id="sec17">
<title>Data availability statement</title>
<p>The raw data supporting the conclusions of this article will be made available by the authors, without undue reservation.</p>
</sec>
<sec sec-type="ethics-statement" id="sec18">
<title>Ethics statement</title>
<p>The studies involving humans were approved by the ethics committee of the College of Preschool Education, Capital Normal University. The studies were conducted in accordance with the local legislation and institutional requirements. The participants provided their written informed consent to participate in this study.</p>
</sec>
<sec sec-type="author-contributions" id="sec19">
<title>Author contributions</title>
<p>CG: Supervision, Writing &#x2013; review &#x0026; editing, Conceptualization. MG: Visualization, Formal Analysis, Writing &#x2013; original draft. YC: Data curation, Methodology, Writing &#x2013; original draft, Investigation. FY: Validation, Writing &#x2013; review &#x0026; editing, Investigation, Data curation. YC: Writing &#x2013; review &#x0026; editing, Data curation, Investigation. JC: Data curation, Investigation, Writing &#x2013; review &#x0026; editing, Conceptualization. SZ: Supervision, Methodology, Writing &#x2013; review &#x0026; editing.</p>
</sec>
<sec sec-type="funding-information" id="sec20">
<title>Funding</title>
<p>The author(s) declare that financial support was received for the research and/or publication of this article. This work was supported by the Social Science Foundation of Beijing [grant number 21JYC023].</p>
</sec>
<sec sec-type="COI-statement" id="sec21">
<title>Conflict of interest</title>
<p>The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.</p>
</sec>
<sec sec-type="ai-statement" id="sec22">
<title>Generative AI statement</title>
<p>The authors declare that no Gen AI was used in the creation of this manuscript.</p>
</sec>
<sec sec-type="disclaimer" id="sec23">
<title>Publisher&#x2019;s note</title>
<p>All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article, or claim that may be made by its manufacturer, is not guaranteed or endorsed by the publisher.</p>
</sec>
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