Dimensionality Of Scale Research Articles

Confirmatory Factor Analysis and Measurement Invariance of the Perception of Partner Psychological Abuse (PPPA) in Nigeria and South Africa

Purpose: Examining the psychometric properties of a research scale is a critical step in ensuring its reliability and validity. This study evaluates the psychometric properties of the Perception of Partner Psychological Abuse (PPPA) scale, developed to assess individuals' perceptions of psychologically abusive behaviors in intimate relationships, in Nigeria and South Africa. Methods: The study involved participants (N = 823) who were predominantly Black (African) (98.5%), with females (n = 452, 54.9%) and males (n = 371, 45.1%) from Nigeria (n = 291) and South Africa (n = 532). Various confirmatory factor analysis (CFA) models were used to assess the scale's factor structure and dimensionality. Measurement invariance procedures were employed to evaluate the equivalence of the factor structure across gender and country. Construct validity, including both convergent and discriminant validity, was also examined. Results: Findings indicated that the PPPA scale is appropriate for measuring perceptions of partner psychological abuse. The scale demonstrated adequate convergent and discriminant validity, and composite reliability showed good internal consistency. The hypothesized four-factor structure aligned well with the data, with observed variables collectively and individually contributing to the overall construct and subconstructs. The factor structure was consistent across genders and countries, confirming the scale's multidimensionality. Differences in the perception of partner psychological abuse were observed between the two countries. Conclusions: This study validates the psychometric properties of the PPPA scale, emphasizing the relevance of power dynamics and economic disparities in shaping perceptions of partner psychological abuse. It reinforces the scale's value as a tool for recognizing and addressing psychological abuse in intimate relationships. Keywords: Psychological Abuse, Partner Violence, Verbal Aggression, Isolation, Control, Neglect, Economic Abuse, Financial Abuse.

Psychometric properties and validation of the depression, anxiety and stress scale (DASS-18) in a sample of Moroccan university students

Objective: This study aimed to examine the psychometric properties of the 21-item Depression, Anxiety, and Stress Scale (DASS-21) in a sample of Moroccan students. Method: A total of 208 Moroccan students participated in this study. The dimensionality of the DASS-21 scale was assessed using exploratory factor analysis. Construct validity was assessed using the Stress Perception (PSS-10), State Anxiety (SAI), and Depression (CESD-10) scales. Results: Correlation analyses between Depression, Anxiety, and Stress subscales showed significant results. The exploratory factor analysis results confirmed the DASS’s three-dimensional structure. Furthermore, correlation analyses revealed positive correlations between the DASS-18 sub-dimensions and the three scales for Stress (PSS-10), Anxiety (SAI), and Depression (CESD-10). Conclusion: In line with previous work, the results of this study suggest that the DASS-18 reflect adequate psychometric properties, making it an appropriate tool for use in the university context.

Patients’ views on physicians’ communication skills in telemedicine: Validation of Communication Assessment Tool among Bangladeshi sample

ABSTRACT Background Technological advancement has added new dimensions to the communication between physicians and their patients in healthcare settings worldwide. This study aimed to measure patients’ views about physicians’ interpersonal communication during telemedicine consultations by cultural adaptation and validation of the communication assessment tool (CAT) in Bangladesh. Methods A cross-sectional phone survey was conducted among 400 patients who received healthcare services from a telemedicine centre in Bangladesh. Both exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) were performed to test the dimensionality of the CAT-Bangla scale. The goodness of fit of the CFA was assessed using the comparative fit index (CFI), Tucker–Lewis index (TLI), Chi-square values, root-mean-square error of approximation (RMSEA) and standardized root mean squared residual (SRMR). The internal consistency reliability of the CAT-Bangla scale was assessed using Cronbach's alpha. Results Factor analysis findings suggest that the CAT-Bangla scale is unidimensional with good internal consistency (Cronbach's α = 0.876). The individual item analysis findings suggest that most of the patients felt that the physicians treated them with respect (81% rated ‘excellent’) and allowed them to talk without interruption (73.5% rated ‘excellent’). Overall, the level of satisfaction among patients regarding physicians’ communication skills was high with a mean score of 4.36 (SD = 0.30) across all the 14 items. However, the patients were not satisfied with the amount of time that physicians spent with them as none of them reported ‘excellent’ in that domain. Conclusion The CAT-Bangla scale is feasible, valid, and internally consistent for measuring physicians’ communication skills in the telemedicine environment. This study can contribute to policymakers regarding the integration of learning communication skills of future physicians to competently deliver healthcare in the telemedicine environment. It would also help to understand various aspects of doctor-patient communication in a telemedicine context.

Validation of Psychometric Properties of Partners in Health Scale for Heart Failure.

Background: Congestive heart failure (CHF) is a complex chronic disease, and it is associated with a second comorbid condition in more than half of cases. Self-management programs can be specific to CHF or generic for chronic diseases. Several tools have been validated for CHF. Presently, there are no established generic instruments that are validated for measuring self-management in CHF. Objective: This study aims to evaluate the internal reliability and construct validity (psychometric properties) of the Partners in Health (PIH) scale for patients with congestive heart failure, a generic chronic disease self-management tool. Methods: The study included 210 adult CHF patients [120 with heart failure with reduced ejection fraction (HfrEF), 90 with preserved ejection fraction (HfpEF)], from Community Cardiology Outpatients in West Melbourne, Australia, who were treated in community cardiology and were included between May 2022 and Jan 2024. The screened patient population were diagnosed with CHF and were eligible for an SGLT-2 inhibitor. Cohort analysis used the Bayesian confirmatory factor analysis to evaluate the a priori four-factor structure. Omega coefficients and 95% credible intervals (CI) were used to assess internal reliability. Results: In the CHF (HFrEF) and preserved ejection fraction (HFpEF) cohorts, participants' mean [standard deviation (SD)] age was 66.8 (13.5) and 71.3 (9.76) years. Description of study sociodemographics highlighted that 88% and 52% of patients were male, there was a BMI > 50% in both cohorts, eGFR > 60 mL/min were 59% and 74%, and LVEF < 40% and > 50% were 99% and 100%, respectively. Model fit for the hypothesised model was adequate (posterior predictive p = 0.073) and all hypothesised factor loadings were substantial (>0.6) and significant (p < 0.001). Omega coefficients (95% CI) for the PIH subscales of Knowledge, Partnership, Management and Coping were 0.84 (0.79-0.88), 0.79 (0.73-0.84), 0.89 (0.85-0.91) and 0.84 (0.79-0.88), respectively. Conclusion: This study is original in confirming the dimensionality, known-group validity, and reliability of the PIH scale for measuring generic self-management in outpatients with CHF syndrome.

Validation of the Neuroception of Psychological Safety Scale (NPSS) Among Health and Social Care Workers in the UK.

Psychological safety is essential for rest, recovery, and fostering social connections, particularly for health and social care workers (HSCWs) who frequently operate in high-pressure environments. These workers are prone to traumatic stress, which can elevate their sense of threat and undermine their psychological safety. This study aimed to validate the Neuroception of Psychological Safety Scale (NPSS) among HSCWs in the UK (n = 443). The NPSS is based on polyvagal theory and assesses the dimensions of compassion, social engagement and bodily sensations. Internal consistency, test-retest reliability, convergent, discriminant, and concurrent validity were examined, along with the scale's dimensionality. A three-factor structure was confirmed, with internal consistencies ranging from acceptable to excellent across subscales. Validity was supported by significant associations with measures of team psychological safety, well-being, post-traumatic stress, burnout, body perception, and personality. The NPSS also demonstrated strong test-retest reliability. These results validate the NPSS as a reliable and multidimensional tool for assessing psychological safety in health and social care settings. The study highlights the importance of psychological safety for HSCWs and provides a valuable measure to support interventions aimed at fostering safer and more supportive work environments.

Cross-cultural adaptation and validation of a revised Italian Anterior Knee Pain Scale version.

The study aimed to validate a revised Italian version of the Anterior Knee Pain Scale (AKPS) by addressing shortcomings in previous adaptations and following the COSMIN guidelines to ensure robust psychometric evaluation. One hundred thirty patients with anterior knee pain symptoms were recruited, with 65 undergoing a retest after 7 days to assess the scale's reliability. Structural validity was assessed through confirmatory factor analysis (CFA) to evaluate the scale's dimensionality. Internal consistency was measured using Cronbach's alpha, while test-retest reliability was assessed using the intraclass correlation coefficient (ICC). Measurement error was evaluated using the standard error of measurement (SEM) and the smallest detectable change (SDC). Construct validity was examined by correlating the AKPS with other established scales, including the Knee Injury and Osteoarthritis Outcome Score, Internal Knee Documentation Committee, Victorian Institute of Sport Assessment - Patella, Short-Form 36 Health Survey, and the Visual Analogue Scale. The CFA supported a three-factor model encompassing pain intensity and interference, functional limitations in daily activities, and knee structural and functional issues. The scale demonstrated good internal consistency (Cronbach's α=0.79) and excellent test-retest reliability (ICC=0.91), with low measurement error (SEM<5%). Construct validity was confirmed through moderate-to-strong correlations with related scales, particularly in domains related to pain intensity, symptoms, and daily functioning. The newly validated scale, demonstrating strong psychometric properties, meets international standards for clinical assessment tools, making it a reliable and effective instrument for assessing anterior knee pain in the Italian context.

Arabic validation and cross-cultural adaptation of climate anxiety scale

BackgroundClimate change is an enduring global phenomenon that describes a long-lasting effect of change in weather and temperature of the earth. This study aimed to validate an Arabic version of the Climate Anxiety Scale (ACAS) to assess the anxiety associated with climate change. MethodsA cross-sectional survey was conducted using both online via Google Forms and face-to-face via hard copies, in five Arab countries, Lebanon, Palestine, Egypt, Saudia Arabia, and the United Arab Emirates). The internal consistency of the scale was assessed using the Cronbach's alpha. Exploratory factor analysis (EFA) conducted over principal component analysis assessed the scale dimensionality. Then, confirmatory factor analysis was conducted to investigate the EFA hypothesis of ACAS on anxiety about climate change. ResultsOf the 350 participants, 54.9 % were female, 77.7% lived in urban areas, 15.4% were from North Africa, 46.6 % were from Arab Gulf countries, and 38.0 % were from Bilad Al-Sham. Nearly two-thirds (62.3%) were single, 72.3% had a university degree, 94.9% were aware of climate change, 38.3 % participated in environmental protection programs, and 62.3% reported climate-related anxiety. The item content validity index (CVI) was 0.82–1.00, and the scale CVI (S-CVI) was 0.95. Overall Cronbach's alpha was 0.925 with a 95% confidence interval (CI) [0.902–0.940]. The Kaiser-Mayer-Olkin (KMO) test was 0.93, and Bartlett's test was significant (χ2 = 2762.6 p < 0.001). Bifactor model indices showed high explained common variance (ECV) (0.78), ωH (0.85), relative omega (0.91), H index (0.93), and factor determinacy (FD) (0.96) for the general factor. The general factor explained 78% of the common variance, whereas the group factors shared 22.0%. Model reliability coefficient omega (omega/omega S) for general factor, functional domain, and cognitive domain were 0.94, 0.92, and 0.89, respectively, suggesting a satisfactory fit threshold. ConclusionsThe ACAS tool is valid and reliable for assessing anxiety-related climate change among the Arab Population.

Approach and withdrawal from cognitively effortful activities: Development, validation, and transdiagnostic clinical utility of a cognitive motivation scale

BackgroundDeficits in cognition and motivation predict functioning in depressive and psychotic disorders. However, experimental tasks of cognitive motivation are inconsistently correlated with functioning, time-intensive, and not intuitive in clinical practice. We aimed to develop and validate a self-report instrument to assess motivation processes pertinent to engagement with cognitive activities in daily life. MethodFollowing item generation, scale dimensionality, reliability, and validity were evaluated iteratively over Studies 1–3 with online general adult participants (n1 = 205; n2 = 235; n3 = 181). The 20-item Cognitive Motivation scale was also validated in a Study 3 sub-sample reporting high levels of depressive symptoms (n = 74) and Study 4 early psychosis outpatients (n = 25). ResultsTwo-factor model of cognitive approach and cognitive withdrawal, each with good internal consistency, convergent validity, discriminant validity was supported. Cognitive withdrawal showed stronger associations with cognitive difficulties, depressive symptoms, and functional impairments than traditional motivation scale. Participants reporting high depression levels showed more severe difficulties with cognitive motivation than participants reporting low depression levels. In early psychosis outpatients, correlations with functioning and cognitive effort expenditure provided support for scale validity. LimitationsCross-sectional data collection restricted evaluation of repeated administration psychometric properties. Scale validation was mostly established in online community samples and a small patient sample during the COVID-19 pandemic, thereby limiting generalizability of clinical applications. ConclusionsCognitive Motivation scale is a promising tool for future intervention trials seeking to target motivational processes associated with functioning in the general population and potentially across patient groups with amotivation symptoms.

Leading with care: how health-promoting leadership drives innovation in the Middle East

PurposeLeveraging the job demands-resources (JD-R) theory, this study proposes and validates a mediation model depicting the impact of health-promoting leadership (HPL) on innovation performance (IP), with the relationship partially mediated by two health-related factors: psychological well-being (PWB) and positive conflict (PC).Design/methodology/approachEmploying a structured questionnaire developed from validated scales sourced from the existing literature, the study collected data from a sample of 310 employees across various organizations within the service sector of the United Arab Emirates. The dimensionality, reliability, and validity of scales were assessed using exploratory and confirmatory factor analysis. The study’s seven hypotheses were tested through structural equation modeling in AMOS and mediation analysis using the Hayes process model in SPSS.FindingsSupport was found for all seven hypotheses, demonstrating that HPL exerts both a direct and an indirect effect on IP, with PWB and PC serving as partial mediators.Research limitations/implicationsDistinct from the traditional leadership literature, which often views an employee’s psychological health as a personal matter, this study highlights the organizational role in promoting psychological well-being. It also provides significant theoretical contributions to the underexplored area of conflict management within the context of innovation.Practical implicationsBy promoting employees' PWB, HPL can optimize human capital within organizations. Additionally, leaders can leverage the potential of PC to foster an environment conducive to innovation, resulting in enhanced organizational performance.Originality/valueThe findings enrich the leadership and IP literature by identifying inter-relationships between the three health related antecedents of IP.

Harmonizing perspectives to understand attitudes: A mixed methods approach to crafting an assessment literacy attitude scale

Assessment literacy's vital role in faculty effectiveness within higher education lacks sufficient tools for measuring faculty attitudes on this matter. Employing a sequential mixed-methods approach, this study utilized the theory of planned behavior to develop the Assessment Literacy Attitude Scale (ALAS) and evaluate its psychometric properties within the U.S. higher education context. The qualitative phase involved a literature review of relevant studies and existing self-report measures, interviews with stakeholders, and panel reviews to shape initial item development. Following the establishment of a conceptual foundation and a comprehensive overview of the scale's construction, our study advanced to the quantitative stage that involves factor analytical and item response theory approaches using data from 260 faculty across three public universities in the U.S. Exploratory factor analysis (EFA) was employed initially to obtain preliminary insights into the scale's factorial structure and dimensionality. Confirmatory factor analysis (CFA) was subsequently applied with separate data and the findings largely supported the conclusions from the EFA. Exploratory and confirmatory factor analyses resulted in 15 items loading across two factors in a good model fit range. Finally, we used nonparametric item response theory (IRT) techniques based on Mokken Scale Analysis (MSA) to evaluate individual items for evidence of effective psychometric properties to support the interpretation of ALAS scores, including monotonicity, scalability, and invariant item ordering. The newly-developed scale shows promise in assessing faculty attitudes toward enhancing their assessment literacy.

The process model of self‐control: Developing a measure of self‐control strategies

AbstractThe purpose of this research was to develop and examine a measure of self‐control strategies, proposed in the process model of self‐control. Across three studies (N = 1045), we developed and refined items, examined scale dimensionality and relationships with orbiting constructs, and assessed criterion‐related validity. Findings provide initial support for a 34‐item measure of six self‐control strategies: five strategies that were theoretically proposed in the process model and one that emerged empirically from our data. The proposed Self‐Control Strategies Scale was significantly correlated with other similar measures and demonstrated expected relationships with orbiting constructs and criterion‐related validity. This measure may be useful in expanding our understanding of different strategies beneficial for long‐term goal pursuit.

Individual accountability of MTurk gig workers: examining the scale dimensionality

Individual accountability of MTurk gig workers: examining the scale dimensionality

Assessing the dimensionality of the sense of coherence scale (SOC-L9) using Ghanaian university students: Guarding against the method effect

BackgroundThe dimensionality of the sense of coherence (SOC-L9) scale has been in contention due to the varied factor structure revealed in the literature. In this study, we assessed the dimensionality of the SOC-L9 scale using Ghanaian university students while guarding against the method effect. The study also examined the gender measurement invariance of the scale. MethodsThis research conveniently sampled 1062 students who responded to the SOC-L9 scale with negative items reversed to positive items. A larger proportion of the participants were male students (n = 769, 72.4 %), with 293(27.6 %) being female students. The youngest participant was 18 years old, whereas the oldest was 42 years old. Following all validation studies protocols, four distinct confirmatory factor analysis models were fitted and compared (i.e., unidimensional, three-factor first-order, three-factor second-order and bifactor models). ResultsThe initial model comparison revealed that the bifactor CFA model [CFI = 0.958, SRMR = 0.036, AIC = 21231.35, BIC = 21370.45] was superior to the unidimensional [CFI = 0.914, SRMR = 0.046, AIC = 26280.67, BIC = 26414.8] and 3-factor models [CFI = 0.932, SRMR = 0.040, AIC = 26221.67, BIC = 26370.71]. Upon further probing, it was discovered that SOC-L9 functions best as a unidimensional scale for the university student population. Gender measurement invariance was established for configural invariance [CFI = 0.986, SRMR = 0.044], metric invariance [CFI = 0.894, SRMR = 0.051] and scalar invariance [CFI = 0.983, SRMR = 0.047]. ConclusionThe SOC-L9 scale has a nested structure with the various sub-scales interacting to produce a summary total observed score. The structure of the SOC-L9 requires scholars to treat the scale as a unidimensional scale rather than a multidimensional one. This latent structure was found to be consistent with male and female university students.

Why Do People Watch Pornography? Cross-Cultural Validation of the Pornography Use Motivations Scale (PUMS) and Its Short Form (PUMS-8)

ABSTRACT Motivations for pornography use may vary across gender identities, sexual orientations, and geographical regions, warranting examination to promote individual and public health. The aims of this study were to validate the Pornography Use Motivations Scale (PUMS) in a diverse, multicultural sample, and develop a short form (PUMS-8) that can assess a wide range of pornography use motivations. Using data from 42 countries (N = 75,117; Mage = 32.07; SDage = 12.37), enabled us to thoroughly evaluate the dimensionality, validity, and reliability of the Pornography Use Motivations Scale (PUMS), leading to the development of the more concise PUMS-8 short scale. Additionally, language-, nationality-, gender-, and sexual-orientation-based measurement invariance tests were conducted to test the comparability across groups. Both the PUMS and the PUMS-8 assess eight pornography use motivations, and both demonstrated excellent psychometric properties. Sexual Pleasure emerged as the most frequent motivation for pornography use across countries, genders, and sexual orientations, while differences were observed concerning other motivations (e.g. self-exploration was more prevalent among gender-diverse individuals than men or women). The motivational background of pornography use showed high similarity in the examined countries. Both the PUMS and the PUMS-8 are reliable and valid measurement tools to assess different types of motivations for pornography use across countries, genders, and sexual orientations. Both scales are recommended for use in research and clinical settings.

Validation of Patient-Reported Outcome Measure in Pediatric CKD (PRO-Kid).

Measuring the burden of symptoms that matter most to children and adolescents with chronic kidney disease (CKD) is essential for optimizing patient-centered care. We developed a novel CKD-specific Patient-Reported Outcome measure (PRO-Kid) to assess both frequency and impact of symptoms in children. In the current study, we further assessed the validity and internal consistency of PRO-Kid. In this multicenter study, children age 8 to 18 years with stages 3-5 CKD, including those on dialysis, were recruited from five pediatric centers. Children completed the 14-item PRO-Kid questionnaire and the validated Pediatric Quality of Life Inventory (PedsQL™ 4.0). We explored the dimensionality of the PRO-kid scale using exploratory and confirmatory factor analysis, to either establish that it is a unidimensional construct or identify evidence of subfactors. We then assessed internal consistency (Cronbach's alpha [Cα]) and construct validity (Pearson correlations). In total, 100 children were included. The median eGFR was 27.4 ml/min/1.73m2 [7.43, 63.4], and 26 children (26%) were on dialysis. Both the PRO-Kid frequency and the impact scales were unidimensional. Cα was high for both the PRO-Kid frequency and impact scales, 0.83 (95% CI = 0.78 to 0.88) and 0.84 (95% CI = 0.80 to 0.89) respectively, showing strong internal consistency. Pearson correlations between PRO-Kid and PedsQL™ scores were also strong: -0.78 (95% confidence interval [CI] = -0.85 to -0.70) for the frequency score and -0.69 (95% CI = -0.78 to -0.56) for the impact score, reflecting the association between poorer quality of life and higher symptom burden. PRO-Kid is a novel patient-reported symptom burden tool for children 8-18 years of age with CKD that correlates strongly in the expected direction with PedsQL™, supporting its validity. Future work will evaluate changes in PRO-Kid score with progression of CKD, and implementation of the tool into clinical care.

Psychometric evaluation of the pictorial scale of perceived movement skill competence in Chinese children: An item response theory analysis.

This study aimed to investigate the psychometric characteristics of the Pictorial Scale of Perceived Movement Skill Competence (PMSC) in Chinese children, utilizing the principles of item response theory (IRT). A total of 284 children (147 boys), aged 4-10years (Mage = 7.39, SD = 2.18), from four schools were recruited for testing, adhering to the principle of random sampling. The Rasch model was applied to evaluate the rating scale validity, local independence, scale dimensionality, person and item fit statistics, and differential item functioning (DIF). (1) The rating scale validity was confirmed by the monotonically increasing trend in both average item difficulty measures and Andrich thresholds. (2) However, the observation that standardized residual correlations for all items remained below 0.3 unequivocally confirmed the presence of local independence among the variables. (3) The scale's dimensions were substantiated, with Rasch measures explaining 40.6% of total variance, exceeding the 40% threshold. Additionally, the first contrast had an eigenvalue of 1.8 and explained 8.80% of the variance, both exceeding the minimum 3:1 ratio. Consequently, the unidimensionality assumption of the item was supported. (4) Person and item fit statistics indicated requisite reliability and separation, with all achieving suitable infit and outfit measures, and point-biserial correlations exceeding 0.55. (5) Regarding gender DIF, it was observed that the majority of items did not exhibit statistically significant gender DIF effects (p > 0.05) except item 8 (Bounce a ball, t = -2.74, p < 0.01, DIF = -0.51). Rasch analysis revealed that the instrument exhibited strong scale validity among Chinese children, adhering to the Rasch model's unidimensionality and local independence principles, with robust person and item reliability and separation. All items demonstrated a good fit. Additionally, the significant gender difference in item 8 (Bounce a ball) warrants further consideration. In conclusion, PMSC is suitable for assessing the PMSC of Chinese children.

Development of the Individual and Peer Study Skills Scale

Learners can demonstrate the performance expected of them in study skills individually or with peers. The literature shows that there is no customization of study skills, such as working individually or with peers. Therefore, there is a need for measurement tools that can identify the needs of learners while determining their study skills for both individual and peer activities. This study aims to develop a scale to measure university students' individual and peer study skills. The research was conducted using an exploratory correlational design, and data was collected from two different samples for pilot and validation applications. The pilot and validation application sample comprised 470 and 323 teacher candidates. Item analysis for item validity and exploratory factor analysis (EFA) for construct validity were conducted on the pilot study data. Before the EFA, optimal parallel analysis was used to examine the scale's dimensionality. Confirmatory factor analysis (CFA) was conducted on the validation data to gather evidence for construct validity. The optimal parallel analysis suggested a two-dimensional structure for the scale. As a result of the EFA, a two-dimensional construct with 28 items, consisting of 16 and 12 items in each dimension, explained 58.8% of the variance. The first dimension of the scale was named peer study skills, and the second was named individual study skills. Item analysis revealed that the discrimination of the items in both dimensions was sufficient. The CFA results confirmed the two-factor construct of the scale. The trial and validation studies data showed that the reliability coefficients, considering both dimensions individually and the overall scale, indicated that the scores are reliable.

Dimensionality assessment in ordinal data: a comparison between parallel analysis and exploratory graph analysis.

In the social sciences, accurately identifying the dimensionality of measurement scales is crucial for understanding latent constructs such as anxiety, happiness, and self-efficacy. This study presents a rigorous comparison between Parallel Analysis (PA) and Exploratory Graph Analysis (EGA) for assessing the dimensionality of scales, particularly focusing on ordinal data. Through an extensive simulation study, we evaluated the effectiveness of these methods under various conditions, including varying sample size, number of factors and their association, patterns of loading magnitudes, and symmetrical or skewed item distributions with assumed underlying normality or non-normality. Results show that the performance of each method varies across different scenarios, depending on the context. EGA consistently outperforms PA in correctly identifying the number of factors, particularly in complex scenarios characterized by more than a single factor, high inter-factor correlations and low to medium primary loadings. However, for datasets with simpler and stronger factor structures, specifically those with a single factor, high primary loadings, low cross-loadings, and low to moderate interfactor correlations, PA is suggested as the method of choice. Skewed item distributions with assumed underlying normality or non-normality were found to noticeably impact the performance of both methods, particularly in complex scenarios. The results provide valuable insights for researchers utilizing these methods in scale development and validation, ensuring that measurement instruments accurately reflect theoretical constructs.

Psychometric evaluation of the Trust in Science and Scientists Scale.

Reliable and valid measurement of trust in science and scientists is important. Assessing levels of such trust is important in determining attitudes and predicting behaviours in response to medical and scientific interventions targeted at managing public crises. However, trust is a complex phenomenon that has to be understood in relation to both distrust and mistrust. The Trust in Science and Scientists Scale has been adopted with increasing frequency in large-scale public health research. Detailed psychometric evaluation of the scale is overdue and makes meaningful comparisons between studies that use the scale difficult. Here, we examine the scale's dimensionality across five separate samples. We find that two factors emerge that are divided by their item polarity. Implications for scale use and trust in science measurement are discussed.

Adaptation of Short Warwick-Edinburgh Mental Well-being Scale: Its Relationship with Loneliness, Emotional Flexibility and Resilience Among Adolescents

Understanding and measuring mental well-being among adolescents has recently become a priority. The validity and reliability study of the 7-item short version of the Warwick Edinburgh Mental Well-Being Scale (SWEMWBS) has not been examined in Turkish adolescents. Therefore, this study aims to adapt the 7-item Warwick Edinburgh Mental Well-Being Scale to Turkish and examine the relationships between loneliness, emotional flexibility, resilience, and mental well-being. The data were collected by convenience sampling method from 820 adolescents aged 14-18 from 73 city of Turkey. During the adaptation process of SWEMWBS, confirmatory factor analysis, concurrent validity, and reliability analysis were performed. The findings confirmed the one dimensionality of the 7-item scale on the Turkish adolescent sample. In addition, a significant positive relationship was found between mental well-being and emotional flexibility and resilience. However, there was a significant negative correlation between mental well-being and loneliness. The results showed that the Turkish version of SWEMWBS had strong psychometric properties in adolescents.