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<front>
<journal-meta>
<journal-id journal-id-type="publisher-id">Front. Hum. Dyn.</journal-id>
<journal-title-group>
<journal-title>Frontiers in Human Dynamics</journal-title>
<abbrev-journal-title abbrev-type="pubmed">Front. Hum. Dyn.</abbrev-journal-title>
</journal-title-group>
<issn pub-type="epub">2673-2726</issn>
<publisher>
<publisher-name>Frontiers Media S.A.</publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id pub-id-type="doi">10.3389/fhumd.2026.1784355</article-id>
<article-version article-version-type="Version of Record" vocab="NISO-RP-8-2008"/>
<article-categories>
<subj-group subj-group-type="heading">
<subject>Brief Research Report</subject>
</subj-group>
</article-categories>
<title-group>
<article-title>Modeling human&#x2013;technology interaction in isolated, confined, and extreme environments: a PLS-SEM perspective for Human&#x2013;Computer Interaction research</article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author" corresp="yes">
<name>
<surname>Osei</surname>
<given-names>Isaac</given-names>
</name>
<xref ref-type="aff" rid="aff1"></xref>
<xref ref-type="corresp" rid="c001"><sup>&#x002A;</sup></xref>
<uri xlink:href="https://loop.frontiersin.org/people/3270289"/>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="conceptualization" vocab-term-identifier="https://credit.niso.org/contributor-roles/conceptualization/">Conceptualization</role>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="Data curation" vocab-term-identifier="https://credit.niso.org/contributor-roles/data-curation/">Data curation</role>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="methodology" vocab-term-identifier="https://credit.niso.org/contributor-roles/methodology/">Methodology</role>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="software" vocab-term-identifier="https://credit.niso.org/contributor-roles/software/">Software</role>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="Writing &#x2013; original draft" vocab-term-identifier="https://credit.niso.org/contributor-roles/writing-original-draft/">Writing &#x2013; original draft</role>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="Writing &#x2013; review &#x0026; editing" vocab-term-identifier="https://credit.niso.org/contributor-roles/writing-review-editing/">Writing &#x2013; review &#x0026; editing</role>
</contrib>
<contrib contrib-type="author" corresp="yes">
<name>
<surname>Carie</surname>
<given-names>Anil</given-names>
</name>
<xref ref-type="aff" rid="aff1"></xref>
<xref ref-type="corresp" rid="c001"><sup>&#x002A;</sup></xref>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="conceptualization" vocab-term-identifier="https://credit.niso.org/contributor-roles/conceptualization/">Conceptualization</role>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="Data curation" vocab-term-identifier="https://credit.niso.org/contributor-roles/data-curation/">Data curation</role>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="methodology" vocab-term-identifier="https://credit.niso.org/contributor-roles/methodology/">Methodology</role>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="software" vocab-term-identifier="https://credit.niso.org/contributor-roles/software/">Software</role>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="Writing &#x2013; original draft" vocab-term-identifier="https://credit.niso.org/contributor-roles/writing-original-draft/">Writing &#x2013; original draft</role>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="Writing &#x2013; review &#x0026; editing" vocab-term-identifier="https://credit.niso.org/contributor-roles/writing-review-editing/">Writing &#x2013; review &#x0026; editing</role>
</contrib>
</contrib-group>
<aff id="aff1"><institution>Department of Computer Science and Engineering, SRM University-AP</institution>, <city>Amaravati</city>, <state>Andhra Pradesh</state>, <country country="in">India</country></aff>
<author-notes>
<corresp id="c001"><label>&#x002A;</label>Correspondence: Isaac Osei, <email xlink:href="mailto:isaac_osei@srmap.edu.in">isaac_osei@srmap.edu.in</email>; Anil Carie, <email xlink:href="mailto:anilcarie.c@srmap.edu.in">anilcarie.c@srmap.edu.in</email></corresp>
</author-notes>
<pub-date publication-format="electronic" date-type="pub" iso-8601-date="2026-02-25">
<day>25</day>
<month>02</month>
<year>2026</year>
</pub-date>
<pub-date publication-format="electronic" date-type="collection">
<year>2026</year>
</pub-date>
<volume>8</volume>
<elocation-id>1784355</elocation-id>
<history>
<date date-type="received">
<day>09</day>
<month>01</month>
<year>2026</year>
</date>
<date date-type="rev-recd">
<day>10</day>
<month>02</month>
<year>2026</year>
</date>
<date date-type="accepted">
<day>16</day>
<month>02</month>
<year>2026</year>
</date>
</history>
<permissions>
<copyright-statement>Copyright &#x00A9; 2026 Osei and Carie.</copyright-statement>
<copyright-year>2026</copyright-year>
<copyright-holder>Osei and Carie</copyright-holder>
<license>
<ali:license_ref start_date="2026-02-25">https://creativecommons.org/licenses/by/4.0/</ali:license_ref>
<license-p>This is an open-access article distributed under the terms of the <ext-link ext-link-type="uri" xlink:href="https://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution License (CC BY)</ext-link>. 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.</license-p>
</license>
</permissions>
<abstract>
<p>Human performance, psychological well-being, and behavioral adaptation in isolated, confined, and extreme (ICE) environments&#x2014;such as intensive care units, remote healthcare settings, disaster zones, and space-analog missions&#x2014;are increasingly mediated through digital and interactive technologies. Understanding how users perceive, experience, and sustain engagement with such systems requires methodological approaches capable of modeling complex psychosocial constructs under constrained conditions. This paper positions Partial Least Squares Structural Equation Modelling (PLS-SEM) as a robust and practical analytical framework for Human&#x2013;Computer Interaction (HCI) research in ICE contexts. We review the methodological limitations of traditional statistical approaches and demonstrate how PLS-SEM enables the simultaneous modeling of latent experiential, cognitive, and behavioral variables central to technology use in extreme environments. Using an illustrative case involving a mobile health (mHealth) system designed for remote and resource-constrained settings, we examine how user experience, user satisfaction, perceived usefulness, perceived ease of use, and system quality influence behavioral intention. The findings indicate that experiential and affective factors&#x2014;particularly user experience and satisfaction&#x2014;play a dominant role in shaping continued usage intentions, while functional attributes exert their influence primarily through indirect pathways. By reframing PLS-SEM as an enabling methodology for ICE research, this paper contributes a theoretically grounded and practically applicable roadmap for researchers investigating human&#x2013;technology interaction in extreme environments.</p>
</abstract>
<kwd-group>
<kwd>behavioral intention</kwd>
<kwd>HCI</kwd>
<kwd>ICE environments</kwd>
<kwd>isolated and confined environments</kwd>
<kwd>PLS-SEM</kwd>
<kwd>psychosocial factors</kwd>
<kwd>telemedicine</kwd>
<kwd>user experience</kwd>
</kwd-group>
<funding-group>
<funding-statement>The author(s) declared that financial support was not received for this work and/or its publication.</funding-statement>
</funding-group>
<counts>
<fig-count count="2"/>
<table-count count="0"/>
<equation-count count="0"/>
<ref-count count="46"/>
<page-count count="7"/>
<word-count count="5026"/>
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<custom-meta-group>
<custom-meta>
<meta-name>section-at-acceptance</meta-name>
<meta-value>Digital Impacts</meta-value>
</custom-meta>
</custom-meta-group>
</article-meta>
</front>
<body>
<sec sec-type="intro" id="sec1">
<label>1</label>
<title>Introduction</title>
<p>Human&#x2013;Computer Interaction (HCI) plays a critical role in supporting human performance, psychological well-being, and decision-making in isolated, confined, and extreme (ICE) environments (<xref ref-type="bibr" rid="ref24">Melo Vargas and Barriga Medina, 2025</xref>). Such environments include intensive care units (ICUs), remote and rural healthcare settings, offshore platforms, polar research stations, disaster response zones, and space-related missions (<xref ref-type="bibr" rid="ref29">Palinkas and Suedfeld, 2021</xref>; <xref ref-type="bibr" rid="ref42">Thomas, 2023</xref>). In these contexts, technology is not merely a productivity tool; it becomes a psychological mediator that shapes stress regulation, trust, resilience, and behavioral adaptation (<xref ref-type="bibr" rid="ref2">Anderson et al., 2023</xref>; <xref ref-type="bibr" rid="ref27">Nezami, 2025</xref>).</p>
<p>As humanity confronts global challenges driven by climate change, pandemics, geopolitical instability, and rapid technological transformation, individuals are increasingly required to live and work in conditions characterized by isolation, confinement, uncertainty, and high cognitive load. Digital and interactive systems&#x2014;ranging from telemedicine platforms and decision-support tools to immersive training (<xref ref-type="bibr" rid="ref3">Blandford, 2019</xref>; <xref ref-type="bibr" rid="ref4">Candra et al., 2025</xref>; <xref ref-type="bibr" rid="ref39">Sharp et al., 2025</xref>)&#x2014;are central to sustaining performance and mental health in such settings (<xref ref-type="bibr" rid="ref24">Melo Vargas and Barriga Medina, 2025</xref>). Understanding how users perceive, experience, and continue to engage with these systems is therefore a fundamental research challenge.</p>
<p>HCI research seeks to examine not only usability and functionality but also the emotional, cognitive, and behavioral dimensions of human interaction with technology (<xref ref-type="bibr" rid="ref41">Tang et al., 2024</xref>; <xref ref-type="bibr" rid="ref43">Upreti et al., 2026</xref>). Constructs such as perceived ease of use, trust, satisfaction, and user experience are especially salient in ICE environments, where system failure or disengagement can have serious psychological or operational consequences. However, these constructs are inherently latent: they cannot be measured directly and must be inferred through observable indicators (<xref ref-type="bibr" rid="ref15">Gudergan et al., 2025</xref>; <xref ref-type="bibr" rid="ref16">Hair et al., 2021</xref>; <xref ref-type="bibr" rid="ref33">Rosseel and Loh, 2024</xref>).</p>
<p>Traditional statistical techniques, such as multiple regression or analysis of variance, struggle to capture the complex, interdependent relationships among such latent constructs (<xref ref-type="bibr" rid="ref5">Cepeda et al., 2024</xref>; <xref ref-type="bibr" rid="ref15">Gudergan et al., 2025</xref>; <xref ref-type="bibr" rid="ref16">Hair et al., 2021</xref>), particularly when indirect effects, mediation, or formative indicators are involved. Structural Equation Modeling (SEM) offers a powerful alternative by enabling the simultaneous estimation of measurement and structural relationships (<xref ref-type="bibr" rid="ref11">Gefen et al., 2000</xref>; <xref ref-type="bibr" rid="ref44">van Kesteren and Oberski, 2019</xref>; <xref ref-type="bibr" rid="ref35">Schamberger et al., 2025</xref>). Among SEM approaches, Partial Least Squares Structural Equation Modeling (PLS-SEM) is particularly well suited to ICE-related HCI research due to its flexibility, tolerance for moderate samples, robustness to non-normal data, and strong predictive orientation (<xref ref-type="bibr" rid="ref9">Ferraro et al., 2026</xref>; <xref ref-type="bibr" rid="ref17">Hair et al., 2019</xref>; <xref ref-type="bibr" rid="ref37">Shah et al., 2026</xref>).</p>
<p>This paper argues that PLS-SEM provides a methodological lens uniquely aligned with the demands of HCI research in ICE environments. By demonstrating how PLS-SEM can model psychosocial and experiential factors central to sustained technology use, this study contributes both methodological guidance and practical insight for researchers working at the intersection of human behavior, technology, and extreme contexts. Rather than advancing a new empirical theory, this paper offers a methodological perspective on the use of PLS-SEM for studying human&#x2013;technology interaction in isolated, confined, and extreme environments, supported by an illustrative application.</p>
</sec>
<sec id="sec2">
<label>2</label>
<title>Human&#x2013;Computer Interaction and ICE environments</title>
<sec id="sec3">
<label>2.1</label>
<title>Human&#x2013;Computer Interaction as a psychosocial discipline</title>
<p>Human&#x2013;Computer Interaction is an interdisciplinary field concerned with the design, evaluation, and implementation of interactive systems for human use (<xref ref-type="bibr" rid="ref6">Clemmensen et al., 2016</xref>; <xref ref-type="bibr" rid="ref20">Kaewkitipong et al., 2022</xref>). It integrates perspectives from computer science, psychology, cognitive science, and the social sciences to ensure that technologies align with human capabilities, limitations, and needs (<xref ref-type="bibr" rid="ref41">Tang et al., 2024</xref>; <xref ref-type="bibr" rid="ref43">Upreti et al., 2026</xref>). Beyond functionality, HCI emphasizes usability, emotional engagement, trust, and satisfaction&#x2014;dimensions that become critical when users operate under stress or isolation.</p>
<p>In ICE environments, the stakes of HCI design are amplified. Poorly designed systems can increase cognitive load, exacerbate stress, and undermine user confidence, while well-designed systems can enhance resilience, support mental health, and promote sustained engagement (<xref ref-type="bibr" rid="ref24">Melo Vargas and Barriga Medina, 2025</xref>). As a result, HCI research in these contexts increasingly focuses on latent psychological and experiential constructs that influence how users adapt to and rely on technology.</p>
</sec>
<sec id="sec4">
<label>2.2</label>
<title>Methodological challenges in ICE-oriented HCI research</title>
<p>Research in ICE contexts often involves small or specialized populations, such as healthcare professionals, emergency responders, or individuals in remote locations. Data collection is frequently constrained, and survey responses may violate assumptions of normality (<xref ref-type="bibr" rid="ref2">Anderson et al., 2023</xref>; <xref ref-type="bibr" rid="ref24">Melo Vargas and Barriga Medina, 2025</xref>). Moreover, theoretical models in these domains are often exploratory or evolving, reflecting the novelty of the technologies involved (<xref ref-type="bibr" rid="ref23">Mehta et al., 2025</xref>; <xref ref-type="bibr" rid="ref31">Ram&#x00ED;rez-Correa et al., 2020</xref>; <xref ref-type="bibr" rid="ref39">Sharp et al., 2025</xref>).</p>
<p>Conventional statistical methods are ill-equipped to address these challenges. They typically assume direct, independent relationships between observed variables and lack the capacity to model latent constructs, mediation effects, or complex causal pathways (<xref ref-type="bibr" rid="ref12">Ghazali and Yaacob, 2025</xref>; <xref ref-type="bibr" rid="ref16">Hair et al., 2021</xref>). These limitations can lead researchers to oversimplify theoretical models, reducing their explanatory power.</p>
</sec>
</sec>
<sec id="sec5">
<label>3</label>
<title>Structural Equation Modeling for ICE-focused HCI research</title>
<sec id="sec6">
<label>3.1</label>
<title>Why PLS-SEM?</title>
<p>Structural Equation Modeling provides a comprehensive framework for testing theoretical models involving latent variables (<xref ref-type="bibr" rid="ref1">Almeida, 2024</xref>; <xref ref-type="bibr" rid="ref22">Lebakula et al., 2025</xref>). While covariance-based SEM (CB-SEM) is effective for theory confirmation under strict assumptions, it requires large samples, multivariate normality, and well-established theoretical foundations (<xref ref-type="bibr" rid="ref16">Hair et al., 2021</xref>; <xref ref-type="bibr" rid="ref46">Vukovi&#x0107;, 2024</xref>)&#x2014;conditions rarely met in ICE-related HCI studies. PLS-SEM, by contrast, is a variance-based approach designed to maximize predictive accuracy. It performs well with small to large samples, handles non-normal data effectively, and accommodates both reflective and formative measurement models (<xref ref-type="bibr" rid="ref13">Goktas and Dirsehan, 2025</xref>; <xref ref-type="bibr" rid="ref14">Greifenstein et al., 2026</xref>; <xref ref-type="bibr" rid="ref17">Hair et al., 2019</xref>). These characteristics make PLS-SEM particularly suitable for modeling psychosocial constructs in constrained environments.</p>
<p>Applications of PLS-SEM in related domains, such as smart health services adoption (<xref ref-type="bibr" rid="ref40">Sun and Zhao, 2025</xref>), demonstrate its effectiveness in identifying nuanced drivers of behavioral intention. These studies show that both functional factors and emotional constructs jointly influence user outcomes. Beyond healthcare, PLS-SEM has been widely applied across multiple disciplines. More broadly, PLS-SEM has been widely investigated and applied across diverse disciplines, including marketing (<xref ref-type="bibr" rid="ref13">Goktas and Dirsehan, 2025</xref>), information systems (<xref ref-type="bibr" rid="ref38">Sharma et al., 2024</xref>), extended reality (<xref ref-type="bibr" rid="ref28">Oncioiu and Priescu, 2022</xref>), psychology (<xref ref-type="bibr" rid="ref8">de Rooij et al., 2023</xref>), behavioral sciences (<xref ref-type="bibr" rid="ref26">Naseer et al., 2022</xref>), environmental studies (<xref ref-type="bibr" rid="ref25">Mobeen et al., 2026</xref>), healthcare research (<xref ref-type="bibr" rid="ref36">Senapati et al., 2026</xref>), and related fields (<xref ref-type="bibr" rid="ref34">Sarstedt et al., 2022</xref>).</p>
</sec>
<sec id="sec7">
<label>3.2</label>
<title>Latent constructs relevant to ICE environments</title>
<p>In ICE contexts, constructs such as user satisfaction, trust, system quality, and user experience are closely linked to psychological well-being and behavioral persistence. For example, a telemedicine platform deployed in a remote setting must not only function correctly but also instill confidence, reduce anxiety, and provide a positive experiential flow. PLS-SEM allows researchers to model these constructs simultaneously and examine how they interact to influence behavioral intention. Such modeling can be conducted at either the pre-usage or post-usage stage of the system.</p>
<p>Models of technology acceptance such as the Technology Acceptance Model (TAM) (<xref ref-type="bibr" rid="ref7">Davis, 1989</xref>) and the Unified Theory of Acceptance and Use of Technology (UTAUT) (<xref ref-type="bibr" rid="ref45">Venkatesh et al., 2003</xref>) emphasize latent constructs like perceived usefulness, perceived ease of use, satisfaction, and behavioral intention. These constructs have been implicated in user engagement across contexts including telemedicine and wearable technologies.</p>
<p>In ICE environments, such latent psychosocial and experiential constructs can be critical determinants of sustained technology engagement, necessitating analytical frameworks that permit simultaneous estimation of direct, indirect, and mediated effects.</p>
</sec>
</sec>
<sec id="sec8">
<label>4</label>
<title>Illustrative case: evaluating an mHealth system for constrained environments</title>
<sec id="sec9">
<label>4.1</label>
<title>Case context</title>
<p>To illustrate the application of PLS-SEM in ICE-oriented HCI research, we present a case involving a mobile health (mHealth) application designed to support users with chronic conditions in remote and resource-constrained environments. Such systems are increasingly deployed in rural healthcare, emergency response settings, and other contexts where direct access to medical professionals is limited&#x2014;conditions that closely mirror key characteristics of ICE environments.</p>
<p>Remote healthcare settings and ICE analogs share several common constraints, including restricted access to clinicians, bandwidth and connectivity limitations, and elevated psychological and emotional demands on users. These similarities make mHealth systems an appropriate proxy for examining human&#x2013;technology interaction in ICE-related research contexts.</p>
<p>The study investigates how user experience, user satisfaction, system quality, and perceived ease of use influence behavioral intention to continue using the system. Data from users with prior experience using an mHealth application, originally collected for a different study, were utilized as a secondary dataset. The dataset was subsequently pre-processed to align with the objectives of the present study. The final dataset comprises 500 observations and includes six latent constructs: user experience (UX), user satisfaction (US), system quality (SQ), perceived usefulness (PU), perceived ease of use (PEOU), and behavioral intention (BI). Each construct is modeled reflectively and measured using three observed indicators.</p>
</sec>
<sec id="sec10">
<label>4.2</label>
<title>Conceptual model and hypotheses</title>
<p>Drawing on the Technology Acceptance Model (TAM) and user experience theory (<xref ref-type="bibr" rid="ref18">Hassenzahl and Tractinsky, 2006</xref>), the conceptual model integrates both instrumental and experiential constructs. Rather than treating user experience as a single outcome, it is modeled as a multidimensional latent construct encompassing aesthetic appeal, emotional response, and trust&#x2014;dimensions especially relevant under constrained conditions. <xref ref-type="fig" rid="fig1">Figure 1</xref> depicts the conceptual model that guides this illustrative case.</p>
<fig position="float" id="fig1">
<label>Figure 1</label>
<caption>
<p>Conceptual framework of the proposed model (authors&#x2019; own creation).</p>
</caption>
<graphic xlink:href="fhumd-08-1784355-g001.tif" mimetype="image" mime-subtype="tiff">
<alt-text content-type="machine-generated">Conceptual diagram showing relationships among constructs: PEOU, PU, UX, and SQ lead to US and BI through hypotheses H1 to H8. All entities are connected by labeled arrows indicating hypothesized effects.</alt-text>
</graphic>
</fig>
<p>Hypotheses were formulated to examine the relationships among perceived ease of use, perceived usefulness, system quality, user experience, user satisfaction, and behavioral intention. The proposed hypotheses are as follows:</p>
<disp-quote>
<p><italic>H1</italic>: Perceived usefulness (PU) has a significant positive effect on user satisfaction (US).</p>
</disp-quote>
<disp-quote>
<p><italic>H2</italic>: Perceived usefulness (PU) has a significant positive effect on behavioral intention (BI).</p>
</disp-quote>
<disp-quote>
<p><italic>H3</italic>: Perceived ease of use (PEOU) has a significant positive effect on user satisfaction (US).</p>
</disp-quote>
<disp-quote>
<p><italic>H4</italic>: Perceived ease of use (PEOU) has a significant positive effect on behavioral intention (BI).</p>
</disp-quote>
<disp-quote>
<p><italic>H5</italic>: User experience (UX) has a significant positive effect on user satisfaction (US).</p>
</disp-quote>
<disp-quote>
<p><italic>H6</italic>: User experience (UX) has a significant positive effect on behavioral intention (BI).</p>
</disp-quote>
<disp-quote>
<p><italic>H7</italic>: User satisfaction (US) has a significant positive effect on behavioral intention (BI).</p>
</disp-quote>
<disp-quote>
<p><italic>H8</italic>: System quality (SQ) has a significant positive effect on behavioral intention (BI).</p>
</disp-quote>
</sec>
<sec id="sec11">
<label>4.3</label>
<title>Illustrative application of PLS-SEM</title>
<p>The PLS-SEM analysis was conducted in accordance with the standard application procedure recommended by <xref ref-type="bibr" rid="ref16">Hair et al. (2021)</xref>. The sequential steps involved in this process are illustrated in <xref ref-type="supplementary-material" rid="SM1">Supplementary Figure S1</xref>. The procedure begins with the specification of the measurement and structural models, followed by data collection and model estimation. Subsequently, the results are evaluated through assessment of both the measurement and structural models, with particular attention to reliability, validity, and predictive performance. Where appropriate, additional analyses&#x2014;such as multi-group analysis (MGA), mediation, moderation, and higher-order construct (HOC) modeling&#x2014;may be undertaken prior to final interpretation and conclusion.</p>
<p>Following this procedure, the PLS-SEM analysis was implemented in R (<xref ref-type="bibr" rid="ref30">R Core Team, 2025</xref>), an open-source statistical environment using the <italic>seminr</italic> package (<xref ref-type="bibr" rid="ref32">Ray et al., 2025</xref>) (version 2.3.7). <xref ref-type="fig" rid="fig2">Figure 2</xref> presents the resulting measurement and structural model estimates generated in R. The evaluation of the measurement and structural models is summarized in the subsequent section.</p>
<fig position="float" id="fig2">
<label>Figure 2</label>
<caption>
<p>Measurement and structural model results (authors&#x2019; output from RStudio).</p>
</caption>
<graphic xlink:href="fhumd-08-1784355-g002.tif" mimetype="image" mime-subtype="tiff">
<alt-text content-type="machine-generated">Path diagram visualizing relationships between constructs SQ, PEOU, UX, PU, US, and BI with arrows indicating regression coefficients (&#x03B2; values) and measurement loadings (&#x03BB; values). Hexagons represent latent variables, rectangles are observed variables, and arrow thickness reflects effect size. BI and US display R squared values of 0.505 and 0.467, respectively.</alt-text>
</graphic>
</fig>
<p>Detailed procedural steps, estimation settings, and additional outputs are provided in the <xref ref-type="supplementary-material" rid="SM1">Supplementary material</xref>.</p>
</sec>
<sec id="sec12">
<label>4.4</label>
<title>Summary of measurement and structural results</title>
<p><xref ref-type="fig" rid="fig2">Figure 2</xref> presents the estimated measurement and structural models, including standardized path coefficients and the explanatory power (<italic>R</italic><sup>2</sup>) of the endogenous variables.</p>
<p>A closer examination of the structural paths provides further insight into the hypothesized relationships among the constructs. Perceived usefulness exerted a strong and statistically significant effect on user satisfaction (<italic>H1</italic>: <italic>&#x03B2;</italic>&#x202F;=&#x202F;0.521, <italic>p</italic>&#x202F;&#x003C;&#x202F;0.001), indicating that users&#x2019; evaluations of the system&#x2019;s functional benefits substantially shaped their overall satisfaction. However, its direct effect on behavioral intention was not significant (<italic>H2</italic>: <italic>&#x03B2;</italic>&#x202F;=&#x202F;0.065, <italic>p</italic>&#x202F;=&#x202F;0.247), suggesting that perceived usefulness influences continued use primarily through indirect mechanisms rather than direct motivational pathways. Perceived ease of use demonstrated significant positive effects on both user satisfaction (<italic>H3</italic>: <italic>&#x03B2;</italic>&#x202F;=&#x202F;0.143, <italic>p</italic>&#x202F;=&#x202F;0.003) and behavioral intention (<italic>H4</italic>: <italic>&#x03B2;</italic>&#x202F;=&#x202F;0.132, <italic>p</italic>&#x202F;=&#x202F;0.002), highlighting its role as an enabling factor that lowers interaction barriers and facilitates positive experiential outcomes. User experience emerged as a key driver within the model, significantly influencing user satisfaction (<italic>H5</italic>: <italic>&#x03B2;</italic>&#x202F;=&#x202F;0.146, <italic>p</italic>&#x202F;&#x003C;&#x202F;0.001) and behavioral intention (<italic>H6</italic>: <italic>&#x03B2;</italic>&#x202F;=&#x202F;0.316, <italic>p</italic>&#x202F;&#x003C;&#x202F;0.001), underscoring the importance of affective and experiential dimensions in constrained environments. Consistent with expectation, user satisfaction had a strong positive effect on behavioral intention (H7: <italic>&#x03B2;</italic>&#x202F;=&#x202F;0.343, <italic>p</italic>&#x202F;&#x003C;&#x202F;0.001), reinforcing its central mediating role. In contrast, system quality did not exhibit a statistically significant direct effect on behavioral intention (<italic>H8</italic>: <italic>&#x03B2;</italic>&#x202F;=&#x202F;0.071, <italic>p</italic>&#x202F;=&#x202F;0.069), suggesting that technical performance alone may be insufficient to sustain continued use in ICE-related contexts. Detailed structural estimates, effect sizes, collinearity diagnostics, and confidence intervals for all hypotheses are reported in the <xref ref-type="supplementary-material" rid="SM1">Supplementary Table S4</xref>.</p>
<p>The illustrative PLS-SEM analysis demonstrated satisfactory measurement quality and structural consistency, supporting the adequacy of the proposed model specification for examining psychosocial and experiential constructs in constrained environments. The results indicate that user experience and user satisfaction play a central role in shaping behavioral intention, while perceived ease of use primarily acts as an enabling factor. In contrast, perceived usefulness and system quality exerted limited direct influence on continued use, highlighting the importance of experiential and affective dimensions in ICE contexts. Comprehensive measurement diagnostics, structural estimates, and model evaluation results are reported in the <xref ref-type="supplementary-material" rid="SM1">Supplementary material</xref>.</p>
</sec>
</sec>
<sec id="sec13">
<label>5</label>
<title>Implications for ICE environment research</title>
<p>From an ICE and HCI perspective, the findings suggest that sustained technology use in constrained and high-stress environments is driven more by users&#x2019; lived experiences than by purely functional considerations. The strong effects of user experience and user satisfaction on behavioral intention indicate that how a system feels to use&#x2014;whether it inspires confidence, reduces frustration, and supports users emotionally&#x2014;matters greatly in environments characterized by isolation, limited support, and heightened cognitive load. While perceived usefulness and system quality are necessary foundations, their non-significant direct effects on behavioral intention imply that functional adequacy alone is insufficient to sustain engagement in such contexts. Instead, perceived ease of use appears to act as an enabler, lowering barriers to interaction and indirectly supporting positive experiential outcomes. These results align with HCI research in ICE environments, where technologies must go beyond technical performance to actively support psychological comfort, trust, and resilience, especially when users operate under uncertainty, resource constraints, and prolonged exposure to stress. For researchers, the study illustrates how PLS-SEM can serve as a methodological backbone for analyzing complex psychosocial dynamics in extreme environments.</p>
</sec>
<sec id="sec14">
<label>6</label>
<title>Challenges and limitations</title>
<p>Despite the analytical strengths of PLS-SEM, several limitations should be acknowledged. First, the validity of PLS-SEM results depends on the correct specification of measurement models, particularly the distinction between reflective and formative constructs. In HCI and ICE-oriented research, constructs such as user experience, satisfaction, and system quality are conceptually rich and multifaceted, and misspecification may lead to biased parameter estimates or misleading theoretical inferences. Careful theoretical grounding and indicator selection therefore remain essential.</p>
<p>Second, while PLS-SEM is well suited for modeling complex relationships among latent variables and for prediction-oriented analysis, it remains a quantitative technique that cannot fully capture the nuanced, context-dependent experiences of individuals operating in isolated, confined, and extreme environments. Psychological states such as stress, fatigue, uncertainty, and trust dynamics often evolve situationally and may not be adequately represented through structured survey indicators alone.</p>
<p>Third, the illustrative application relies on secondary cross-sectional data derived from an mHealth context used as an ICE analog. Although such settings share key characteristics with ICE environments, including resource constraints and elevated cognitive demands, caution is warranted when generalizing the findings to other extreme contexts without further empirical validation.</p>
<p>For these reasons, future research would benefit from integrating PLS-SEM with qualitative approaches such as interviews, ethnographic observations, or diary studies to provide richer contextual insight and enhance ecological validity. Mixed-method designs can strengthen interpretation by linking statistical relationships to lived user experiences, thereby supporting more human-centered and context-sensitive technology design in ICE environments. Such integrative approaches are particularly important in ICE environments, where technology use is closely intertwined with psychological resilience, trust formation, and sustained human performance.</p>
</sec>
<sec sec-type="conclusions" id="sec15">
<label>7</label>
<title>Conclusion</title>
<p>This paper positions Partial Least Squares Structural Equation Modelling (PLS-SEM) as a critical methodological framework for advancing Human&#x2013;Computer Interaction research in isolated, confined, and extreme (ICE) environments. By enabling the systematic modeling of latent psychosocial, cognitive, and experiential constructs, PLS-SEM provides researchers with a robust means of examining how users perceive, experience, and sustain engagement with technology under constrained and high-pressure conditions. In such environments, where human performance, psychological well-being, and operational effectiveness are closely intertwined, the ability to capture complex relationships among experiential factors is particularly valuable.</p>
<p>Through an illustrative application, this study demonstrates how PLS-SEM can bridge the gap between theoretical models of technology use and the practical realities faced by users operating in remote, resource-limited, or psychologically demanding contexts. The findings reinforce the idea that effective technology design in ICE settings must extend beyond functional performance to address emotional comfort, usability, trust, and overall user experience. As digital systems increasingly mediate critical tasks in healthcare, emergency response, and space-related operations, methodological approaches that account for these human-centered dimensions become indispensable.</p>
<p>At the same time, the findings should be interpreted in light of the methodological limitations of quantitative modeling approaches, underscoring the value of complementary qualitative and mixed-method research for capturing the lived experiences of users in isolated, confined, and extreme environments.</p>
<p>Looking ahead, future research can extend this methodological perspective to the growing adoption of immersive technologies, such as virtual reality (VR), augmented reality (AR), and extended reality (XR), in ICE environments. These technologies are increasingly being explored for training, psychological support, remote collaboration, and stress mitigation in settings characterized by isolation and confinement. Applying PLS-SEM to study the adoption, sustained use, and experiential impact of VR and AR systems can offer valuable insights into how immersive experiences influence cognitive load, emotional regulation, presence, and behavioral intention in extreme contexts. Integrating experiential constructs with emerging XR applications holds significant potential for informing the design of technologies that not only enhance performance but also actively support human resilience and well-being in ICE environments.</p>
</sec>
</body>
<back>
<sec sec-type="data-availability" id="sec16">
<title>Data availability statement</title>
<p>The datasets presented in this study can be found in online repositories. The names of the repository/repositories and accession number(s) can be found at: <ext-link xlink:href="https://doi.org/10.5281/zenodo.18195037" ext-link-type="uri">10.5281/zenodo.18195037</ext-link>.</p>
</sec>
<sec sec-type="author-contributions" id="sec17">
<title>Author contributions</title>
<p>IO: Conceptualization, Data curation, Methodology, Software, Writing &#x2013; original draft, Writing &#x2013; review &#x0026; editing. AC: Conceptualization, Data curation, Methodology, Software, Writing &#x2013; original draft, Writing &#x2013; review &#x0026; editing.</p>
</sec>
<sec sec-type="COI-statement" id="sec18">
<title>Conflict of interest</title>
<p>The author(s) declared that this work 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="sec19">
<title>Generative AI statement</title>
<p>The author(s) declared that Generative AI was used in the creation of this manuscript. The authors acknowledge the use of ChatGPT-5.2 for copy-editing and language refinement in specific parts of the manuscript. All conceptual, analytical, and interpretive components were solely developed by the authors.</p>
<p>Any alternative text (alt text) provided alongside figures in this article has been generated by Frontiers with the support of artificial intelligence and reasonable efforts have been made to ensure accuracy, including review by the authors wherever possible. If you identify any issues, please contact us.</p>
</sec>
<sec sec-type="disclaimer" id="sec20">
<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>
<sec sec-type="supplementary-material" id="sec21">
<title>Supplementary material</title>
<p>The Supplementary material for this article can be found online at: <ext-link xlink:href="https://www.frontiersin.org/articles/10.3389/fhumd.2026.1784355/full#supplementary-material" ext-link-type="uri">https://www.frontiersin.org/articles/10.3389/fhumd.2026.1784355/full#supplementary-material</ext-link></p>
<supplementary-material xlink:href="Table_1.DOCX" id="SM1" mimetype="application/vnd.openxmlformats-officedocument.wordprocessingml.document" xmlns:xlink="http://www.w3.org/1999/xlink"/>
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<fn-group>
<fn fn-type="custom" custom-type="edited-by" id="fn0001"><p>Edited by: <ext-link ext-link-type="uri" xlink:href="https://loop.frontiersin.org/people/2120275/overview">Laura Thomas</ext-link>, PARSEC Space, United Kingdom</p></fn>
<fn fn-type="custom" custom-type="reviewed-by" id="fn0002"><p>Reviewed by: <ext-link ext-link-type="uri" xlink:href="https://loop.frontiersin.org/people/2226796/overview">Benjamin Stephanus Botha</ext-link>, University of the Free State, South Africa</p>
<p><ext-link ext-link-type="uri" xlink:href="https://loop.frontiersin.org/people/2405707/overview">Mona Mohamed</ext-link>, Towson University, United States</p></fn>
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