The Holland Sleep Disorders Questionnaire: Factorial structure and measurement invariance in a psychiatric sample relative to the general population.

OBJECTIVES: Although common, sleep disorders often remain undiagnosed in psychiatric patients. A screening instrument, like the Holland Sleep Disorders Questionnaire (HSDQ) could improve this. Previous work indicated a 6-factor structure for the HSDQ, but this hasn't been investigated in psychiatric patients. METHODS: HSDQ data was collected in a psychiatric-outpatient sample (n = 1082) and general-population sample (n = 2089). Internal reliability of the HSDQ was investigated and Confirmatory Factor Analyses (CFA) were used to compare 1-, 6-, and second-order 6-factor models in both samples. Next, multigroup-CFA was used to investigate measurement invariance. RESULTS: Except for one subscale, internal reliability was acceptable in both samples. The 6-factor structure model fitted best in both samples and investigation of measurement invariance showed evidence for equality of the overall factor structure (configural invariance). Addition of equality constraints on factor loadings (metric invariance) and item thresholds (scalar invariance) showed good fit for all fit statistics, except for one. Exploratory analyses identified three items for metric and three different items for scalar invariance explaining this non-invariance. CONCLUSION: The HSDQ has a 6-factor structure in psychiatric patients, which is comparable to the general population. However, due to the observed non-invariance, users should be cautious with comparing HSDQ scores between psychiatric and general populations.

Posttraumatic stress disorder (PTSD) in a sample of patients evaluated for acute coronary syndrome: A factor analysis of the PTSD checklist for DSM-5 (PCL-5).

The PCL-5 is a psychometrically sound measure of Post-Traumatic Stress Disorder (PTSD) symptoms. Although the scale is commonly applied to past external traumas (e.g., combat, assault), PTSD symptoms have also been assessed about potentially life-threatening cardiovascular events that represent ongoing internal threats. To date, there is a paucity of studies that have examined the updated scale factor structure for PTSD in patients with suspected acute coronary syndromes (ACS). METHODS: Exploratory and confirmatory factor analyses (EFA, CFA) were conducted using PCL-5 data completed by 830 patients enrolled in the REactions to Acute Care and Hospitalization (REACH) study, an observational cohort study of patients recruited from the emergency department during evaluation for ACS. Follow-up measurement invariance tests were conducted on pre-selected models and on the best-fitting model identified by EFA to evaluate invariance across diagnosis (confirmed v. rule-out ACS), sex, and language. RESULTS: The EFA identified a two-factor model with "Memories of Trauma" (MT) and "Cognitive Behavioral Symptoms" (CBS) factors offering a balanced fit and interpretability. In CFAs, the Anhedonia CFA model performed the best overall. Measurement invariance tests supported strong invariance across confirmed and ruled-out ACS, male and female sex, and English and Spanish language for all models. LIMITATIONS: Only 34 % of the sample was diagnosed with ACS at discharge, which limits generalizability. CONCLUSION: Our study contributes to the understanding of PTSD in the context of internal traumatic reminders and may guide future research and clinical practice by informing intervention targets to improve health and well-being after suspected ACS.

Brief Version of the Revised-Abbreviated Eysenck Personality Questionnaire in a Spanish Young Adult Population.

Eysenck's PEN model is one of the most relevant and fruitful models with empirical support, and continues eliciting a large research corpus. Neverthe less, the systematic limitations regarding the psychoticism dimension and questionable inclusion of social desirability as a personality dimension have limited the model. The current research aimed to estimate an alternative PEN model including social desirability as a control and test its validity and reliability. This sample consists of 2969 Spanish young adults. Confirmatory factor analysis was carried out to test the fitting of four different models to the data. Once the best-fitting model was obtained, multiple-group analyses were carried out to assess the configural, metric, and scalar invariance of the model across sexes. The results showed that the three-dimension PEN model and two-dimension EN model controlling social desirability best fit the data and were invariant across sexes. Despite the apparent appropriateness of both models, the EN model controlling for social desirability is more appropriate due to the weakness of the P dimension.

El modelo PEN de Eysenck es uno de los modelos con evidencia empírica más relevantes y fructíferos que sigue suscitando investigación. Sin embargo, las limitaciones sistemáticas del modelo relacionadas con la dimensión de psicoticismo y la inclusión de la deseabilidad social como dimensión de personalidad han limitado al modelo. El objetivo de la investigación actual fue estimar un modelo PEN alternativo, incluyendo la deseabilidad social como control, y testar su validez y fiabilidad. La muestra estuvo compuesta por 2962 españoles adultos jóvenes. Se evaluó el ajuste de cuatro modelos diferentes a los datos. Una vez establecido el mejor ajuste, se llevó a cabo un análisis multigrupo para evaluar la invarianza configural, métrica y escalar por sexos. Los resultados indicaron que el modelo PEN de tres dimensiones y el modelo EN de dos dimensiones, controlando la deseabilidad social, tenían el mejor ajuste a los datos y eran invariantes entre sexos. A pesar de la aparente adecuación de los modelos, el modelo EN, controlando la deseabilidad social, se consideró más apropiado atendiendo a las debilidades de la dimensión P.

Experiences of Discrimination and Alcohol Involvement Among Young Adults at the Intersection of Race/Ethnicity and Gender.

Although discrimination is an important social determinant of alcohol involvement, there is a dearth of research testing these associations across race/ethnicity and gender. This is an important research gap given that experiences of discrimination and therefore links with alcohol involvement may vary as a function race/ethnicity and gender intersectional identities. We tested for measurement invariance in discrimination and alcohol involvement and examined group differences in means and covariances. The sample consisted of n = 1187 young adults (ages 18-26; n = 193 Black women, n = 209 Latina women, n = 186 White women, n = 198 Black men, n = 203 Latino men, and n = 198 White men). We found evidence for differential item functioning for discrimination and alcohol involvement that violated assumptions needed to make manifest between-group comparisons. To model the source and degree of differential item functioning, we used partial measurement invariance and dropped a discrimination item that did not reliably overlap with the latent factor for White women. After accounting for differential item functioning, Black women and men reported the highest discrimination, followed by Latinx women and men, and then White women and men. White women reported the most alcohol involvement, followed by White men, Latina women, Latino men, Black men, and Black women. Discrimination and alcohol involvement were positively associated for all groups except White women, though effect sizes varied with Black men exhibiting the largest effect. An intersectionally valid understanding of discrimination and alcohol involvement may necessitate statistical approaches that can test for (and model) differential item functioning prior to making between-group quantitative comparisons.

Assessing Jealousy: Factor Analyses, Measurement Invariance, Nomological Validity, and Longitudinal APIM Analyses of the Multidimensional Jealousy Scale.

The Multidimensional Jealousy Scale is the standard instrument to assess cognitive, emotional, and behavioral jealousy. We examined competing factor models and external correlations with broad and narrow traits. Across two studies, we analyzed four samples (Ntotal = 2,117). Confirmatory factor analysis supported the measurement model of three correlated factors in comparison to unidimensional, second-order, and bifactor models. Thus, speaking against the use of a total score. Furthermore, we found measurement invariance between romantic partners. We extended the Multidimensional Jealousy Scale (MJS)' nomological net to personality pathology and replicated prior findings of associations with broad and narrow traits. Study 2 examined longitudinal data (5- to 9-month lag) from couples. Actor-Partner Interdependence Model analyses showed that the MJS predicts facets of relationship satisfaction in actors and partners. We discuss potential avenues for revising the MJS (e.g., heteronormative item wordings).

Measurement Invariance of the Four-Item Entrapment Scale Short-Form (E-SF): A Transnational Examination Across Race/Ethnicity, Sexual Orientation, and Suicide Attempt History Among Minoritized Adults.

Feelings of entrapment-posited to arise when attempts to escape from defeating or humiliating circumstances are blocked-may confer increased risk for psychopathology and suicidal thoughts and behaviors (STB), particularly among minoritized individuals who often have more frequent exposure to such experiences. Including entrapment in empirical models may aid research efforts in further exploring its role in minority mental health. The Entrapment Scale Short-Form (E-SF), a brief version of the 16-item Entrapment Scale, is one tool that may be utilized toward this end; however, to do so meaningfully, its psychometric properties and measurement invariance must be evaluated in diverse samples. This study aimed to examine the factor structure, measurement invariance, and convergent validity of the E-SF across race/ethnicity and sexual orientation in a combined transnational sample of minoritized adults (total N = 1,194). Results supported a one-factor model of the E-SF that was invariant across samples, race/ethnicity, sexual orientation, and history of suicide attempt. Furthermore, significant positive correlations observed between theoretically relevant constructs of anxiety, depression, and posttraumatic stress disorder symptoms supported its convergent validity. Implications include disproportionate levels of entrapment experienced by minoritized individuals-particularly by sexual minorities-which likely reflect the discrimination frequently endured by these individuals.

(Don't fear) the factors: An item-level meta-analysis of the fear of COVID-19 Scale's factor structure and measurement invariance.

The global COVID-19 pandemic saw marked research and clinical interest in evaluating pandemic-related distress, namely fear and anxiety regarding infection and death. The most widely used and earliest developed measure of COVID-19 distress is Ahorsu et al. (2022) seven-item Fear of COVID-19 Scale (FCV-19S). To investigate the factor structure and measurement equivalence of the FCV-19S, we conducted an item-level meta-analysis synthesizing 1155 effect sizes across k = 55 independent samples comprising N = 71,161 individuals. We found that a two-factor measurement model comprising a four-item Emotional factor and a three-item Psychosomatic factor exhibits better fit than the originally proposed single-factor measurement model. Moreover, the bidimensional FCV-19S exhibits partial scalar/strong invariance across the general population, healthcare workers, schoolteachers, and university students as well as partial metric/weak invariance across samples from Bangladesh, China, Japan, Pakistan, Poland, and Portugal. Despite the theoretical and practical implications of these findings, more primary research across a wider range of sample types and countries is undoubtedly needed for further evaluation of the FCV-19S's psychometric properties and generalizability.

Factor structure and measurement invariance of the University Demand-Resource Questionnaire: further evidence from Hungarian university students.

Purpose: The present study aimed to further examine the factor structure and measurement invariance of the UDRQ among a sample of Hungarian university students. Methods: Firstly, the factor structure of the UDRQ was examined among 837 Hungarian university students. Specifically, two measurement models (first-order model and second-order model) were constructed and compared. Secondly, the internal consistency reliability of the UDRQ was examined. Thirdly, measurement invariance of the UDRQ was evaluated across genders. Finally, measurement invariance of the UDRQ was evaluated across two different samples. Results: It was found that the first-order model outperformed the second-order model and better represented the factor structure of the UDRQ subscales. Results of Cronbach's alpha and Composite Reliability suggested that the internal consistency reliabilities of the two UDRQ subscales were satisfactory. Measurement invariance analysis revealed that the UDRQ measurement model was strict invariant across genders and samples. Conclusion: The findings of the present study indicated that the UDRQ displayed satisfactory reliability and validity and could be used to assess demands and resources of Hungarian university students.

Validation and measurement invariance of the Chinese version of the academic self-efficacy scale for university students.

Objectives: The objective of this study was to examine the psychometric properties of the Chinese version of the Academic Self-Efficacy Scale (ASES-C) and confirm its measurement invariance across gender identities. Methods: In this study, 502 university students (29.68% male, 70.32% female) with a mean age of 19.93 years (SD = 1.64) voluntarily participated. The Academic Self-Efficacy Scale (ASE) was utilized as a unidimensional measure of students' learning efficacy. The English version of ASES was translated into Chinese using a forward-backward translation procedure. Confirmatory factor analysis (CFA) and invariance testing were conducted with the single-factor model of ASES. Composite reliability (CR) and internal consistency were calculated based on Cronbach's alpha. Results: Upon re-specification of the model, CFA results for the hypothesized single-factor model with eight items indicated an acceptable fit (CFI = 0.959, TLI = 0.943, SRMR = 0.036, RMSEA = 0.065). Cronbach's alpha and CR values were 0.785 and 0.880, respectively. Multi-group CFA results demonstrated measurement equivalence for the Chinese version of ASES across gender identities. The findings supported the measurement invariance of ASES-C for both male and female participants. Conclusion: The ASES-C, consisting of one factor and eight items, is a reliable instrument for assessing Chinese university students' self-efficacy in learning. Furthermore, it is suitable for making meaningful comparisons across gender identities.

Measurement invariance and differential item functioning of the functionality appreciation scale (FAS) in Colombia and Spain.

The Functionality Appreciation Scale (FAS) is increasingly used in diverse national and linguistic contexts. However, limited work has assessed the extent to which the instrument demonstrates measurement invariance and differential item functioning (DIF) across nations and respondent characteristics. Here, we examined measurement invariance and DIF of the FAS using archival data from adults in Colombia (Mebarak et al., 2023) and Spain (Zamora et al., 2024). Participants included 1420 (women n = 804, men n = 616) respondents from Colombia and 838 (women n = 415, men n = 423) respondents from Spain who completed translations of the FAS. Confirmatory factor analysis supported a unidimensional structure of the FAS in both national groups. Additionally, the FAS achieved full measurement invariance (up to latent mean invariance) across both groups. We also found that the FAS lacked DIF as a function of age, body mass index (BMI), and gender identity across both national groups. Older participants (relative to younger participants), men (relative to women), and participants with lower BMIs (relative to those with higher BMIs) had higher FAS scores. These results support the notion that the FAS is measuring a common underlying construct across these national groups and respondent characteristics.

Violent attitudes in Portugal and Canada: Measurement invariance and psychometric properties of the Evaluation of Violence Questionnaire.

Theory and evidence suggest that attitudes toward violence are relevant for the explanation, prediction, and reduction of violent behavior. The purpose of the present study was to adapt a measure of violent attitudes-the Evaluation of Violence Questionnaire (EVQ)-for use in Portugal, test the cross-country equivalence, and test the validity of both versions. We found the expected one-factor structure, high internal consistency, and cross-country measurement invariance for the Portuguese and original EVQ with men in Portugal (N = 320) and Canada (N = 298). We also found the expected pattern of correlations with measures of more versus less theoretically relevant constructs: both versions of the EVQ showed the strongest correlations with overall aggression and reactive aggression; slightly lower correlations with proactive aggression; negative correlations with self-control; and the smallest correlations with self-esteem. Our results support the equivalence, reliability, and validity of the Portuguese and original versions of the EVQ.

Satisfaction with family life scale: a validity and reliability study in the Turkish context.

BACKGROUND: The family is one of the most important pillars of society. They provide strong feelings of security, emotional support, and belonging. Family health has a significant impact on the welfare of people and society as a whole. OBJECTIVES: This study aimed to create the Satisfaction with Family Life Scale (SWFLS) for Türkiye by modifying the well-known Satisfaction with Life Scale (SWLS) first developed by Diener et al. (1985) and to evaluate its psychometric properties. METHOD: The present study examined the factor structure, measurement invariance, convergent validity, and internal consistency of the SWFLS. Confirmatory factor analyses (CFA) were performed on data from a research group of 646 participants aged 18-71 years (M = 31.71, SD = 11.79) in Study 1. As part of the validity assessment, CFA confirmed the unidimensional structure of the SWFLS. The reliability of the scale was assessed using Cronbach's alpha (α), composite reliability, and the McDonald 0mega (ω). In Study 2, the scale was administered to a new group of 555 participants aged 18 to 67 years (M = 36.4, SD = 9.73) to assess its criterion validity. Test-retest reliability was assessed using a sample of 48 undergraduate students via the intraclass correlation coefficient model 2.1 (ICC2,1). RESULTS: The CFA's results verified the SWFLS's single-factor model. The internal consistency coefficients of Cronbach's α and McDonald's ω were both 0.93. The composite reliability value was 0.94. The result of test-retest reliability (ICC2,1) was 0.96 and ranged from the ICC2,1 value of 0.85 to 0.90 for items of the SWFLS. Multigroup analysis supported full measurement invariance across genders for the SWFLS. Corrected item correlations ranged from 0.75 0.85. The Warwick-Edinburgh Mental Wellbeing Scale (WEMWBS) and SWFLS were shown to have a positive correlation (r = .483, p 0.001), which supports the idea that the two scales have similar convergent validity. CONCLUSIONS: Based on these results, the Turkish SWFLS version can be utilized to measure family life satisfaction in the Turkish sample and has appropriate psychometric validity and reliability.

Individual and group emotional intelligence measurement of sex differences and invariance for individual (WLEIS-S) and group (WEIP-S) emotional intelligence measurement scales.

Different international research groups focus on the study of socio-emotional resources and tools to facilitate adequate management of daily challenges and demands among teachers. This allows for better personal and professional performance. One of these resources that has attracted most attention in recent decades has been that of emotional intelligence. In this regard, the present study set out to analyse the psychometric properties of trait emotional intelligence as a construct. For this purpose, the study focused on two EI measurement instruments. One of the instruments (WLEIS-S) measures individual emotional intelligence and the other instrument (WEIP-S) measures group emotional intelligence. Against this background, the possible invariance of both scales with respect to the sex variable is analysed, as well as possible differences in the variables measured by the scales between sexes. To this end, 452 primary education teachers from Southern Spain filled in the WLEIS-S and WEIP-S tests. The results found in the factor analyses carried out with both instruments showed an excellent fit, as well as good internal consistency. Moreover, both instruments showed robust invariance, which indicates that both scales measure the emotional intelligence construct consistently for both women and men. No differences were found in the assessed latent variables between sexes. To conclude, this study shows psychometric evidence supporting the suitability of the WLEIS-S and WEIP-S scales for the accurate assessment of individual and group emotional intelligence in women and men in the teacher population.

Measurement Invariance of the Perceived Invalidation of Emotion Scale: An Examination Across Race/Ethnicity, Gender, Sexual Orientation, and Intersection of Identities.

The Perceived Invalidation of Emotions Scale (PIES), developed to measure emotional invalidation, could aid research efforts on various internalizing disorders and minority mental health. A prerequisite for its use includes its psychometric evaluation in diverse samples; thus, the current study aimed to evaluate the psychometric properties of the PIES in a combined sample of minoritized adults (N = 876). Results supported a unidimensional structure of the PIES that was invariant across the two minoritized samples, race/ethnicity, gender, sexual orientation, and intersections of race/ethnicity and sexual orientation. A reduced 7- and 4-item PIES with improved unidimensionality and consequentially more interpretable total scores were generated using item response theory analyses. Significant correlations observed between theoretically relevant constructs of adverse mental health outcomes and the PIES above and beyond identity-based discrimination supported the construct validity of the PIES. Implications include the disproportionate amount of emotional invalidation experienced by individuals with minoritized sexual orientation, which may reflect the recent increases in discrimination faced by these individuals.

Large-Scale Item-Level Analysis of the Figural Matrices Test in the Norwegian Armed Forces: Examining Measurement Precision and Sex Bias.

Figural matrices tests are common in intelligence research and have been used to draw conclusions regarding secular changes in intelligence. However, their measurement properties have seldom been evaluated with large samples that include both sexes. Using data from the Norwegian Armed Forces, we study the measurement properties of a test used for selection in military recruitment. Item-level data were available from 113,671 Norwegian adolescents (32% female) tested between the years 2011 and 2017. Utilizing item response theory (IRT), we characterize the measurement properties of the test in terms of difficulty, discrimination, precision, and measurement invariance between males and females. We estimate sex differences in the mean and variance of the latent variable and evaluate the impact of violations to measurement invariance on the estimated distribution parameters. The results show that unidimensional IRT models fit well in all groups and years. There is little difference in precision and test difficulty between males and females, with precision that is generally poor on the upper part of the scale. In the sample, male latent proficiency is estimated to be slightly higher on average, with higher variance. Adjusting for measurement invariance generally reduces the sex differences but does not eliminate them. We conclude that previous studies using the Norwegian GMA data must be interpreted with more caution but that the test should measure males and females equally fairly.

Emotional Regulation Challenges in Chilean Teachers: An Analysis of the Measurement Invariance of the DERS-E and the Influence of Gender and Age.

The study investigates the emotional dysregulation in teachers of the Chilean school system, focusing on gender and age similarities and differences. The sample included 1059 teachers from various regions of Chile, of whom 80.3% were female and 19.7% were male. Participants completed the Spanish version of the Difficulties in Emotional Regulation Scale (DERS-E). A confirmatory factor analysis was carried out to evaluate the structure of the theoretical model, along with the convergent, discriminant, and internal consistency of the instrument. Additionally, a measurement invariance analysis was performed to identify possible differences between demographic groups, which is crucial to ensure that comparisons between these groups are valid and unbiased. The results indicated that the theoretical model presents a good fit to the data and confirms the validity and reliability of the DERS-E. Scalar invariance was achieved among the analyzed groups. We found significant differences in emotional dysregulation between men and women, which also varied by teacher age. The importance of understanding the specific needs of teachers in terms of their emotional regulation is discussed and the urgency of implementing training programs that improve their emotional skills, fostering a positive and effective learning environment, is highlighted.

Evaluation of the psychometric properties of the health care providers' pain and impairment relationship scale (HC-PAIRS) in health professionals and university students from Chile and Colombia.

Background: Chronic back pain is a frequent and disabling health problem. There is evidence that ignorance and erroneous beliefs about chronic low back pain among health professionals interfere in the treatment of people who suffer from it. The Health Care Providers' Pain and Impairment Relationship Scale (HC-PAIRS) has been one of the most used scale to assess these misbeliefs, but no studies have been reported in Latin America. Method: We studied the factorial structure of the HC-PAIRS in health personnel and health sciences university students in two Latin American countries: Colombia (n = 930) and Chile (n = 190). Spain's data was taken of the original study of the Spanish version of the HC-PAIRS (171 Physiotherapy students). Additionally, the measurement invariance of this scale among Chile, Colombia and Spain was evaluated by calculating three nested models: configural, metric and scalar. We used a Confirmatory Factor Analysis (CFA) in both Latin American samples, with Maximum Likelihood Robust (MLR) estimation to estimate the parameters. For the final model in each sample, reliability was assessed with the Composite Reliability (CR) index, and to obtain the proportion of variance explained by the scale the Average Variance Extracted (AVE) was calculated. Results: The one-factor solution shows an acceptable fit in both countries after deleting items 1, 6, and 14. For the resulting scale, the CR value is adequate, but the AVE is low. There is scalar invariance between Chile and Colombia, but not between these two countries and Spain. Conclusions: HC-PAIRS is useful for detecting misconceptions about the relationship between chronic low back pain that would cause health personnel to give wrong recommendations to patients. However, it has psychometric weaknesses, and it is advisable to obtain other evidence of validity.

Measurement Invariance Testing Works.

Psychometricians have argued that measurement invariance (MI) testing is needed to know if the same psychological constructs are measured in different groups. Data from five experiments allowed that position to be tested. In the first, participants answered questionnaires on belief in free will and either the meaning of life or the meaning of a nonsense concept called "gavagai." Since the meaning of life and the meaning of gavagai conceptually differ, MI should have been violated when groups were treated like their measurements were identical. MI was severely violated, indicating the questionnaires were interpreted differently. In the second and third experiments, participants were randomized to watch treatment videos explaining figural matrices rules or task-irrelevant control videos. Participants then took intelligence and figural matrices tests. The intervention worked and the experimental group had an additional influence on figural matrix performance in the form of knowing matrix rules, so their performance on the matrices tests violated MI and was anomalously high for their intelligence levels. In both experiments, MI was severely violated. In the fourth and fifth experiments, individuals were exposed to growth mindset interventions that a twin study revealed changed the amount of genetic variance in the target mindset measure without affecting other variables. When comparing treatment and control groups, MI was attainable before but not after treatment. Moreover, the control group showed longitudinal invariance, but the same was untrue for the treatment group. MI testing is likely able to show if the same things are measured in different groups.

Examining the Measurement Invariance of the Revised Sociosexual Orientation Inventory Among Hispanic and Non-Hispanic White College Women in the U.S.

The Revised Sociosexual Orientation Inventory (SOI-R) is a widely used measure in research, yet the invariance of this measure has not been established in English speaking Non-Hispanic White (NHW) and Hispanic/Latine populations. This study examined whether the SOI-R, a measure developed in Germany, was invariant between US Hispanic/Latina (N = 208) and NHW (N = 190) undergraduate women. Confirmatory factor analysis (CFA) was used to assess model fit in the Hispanic/Latina and NHW samples and fit of increasingly restrictive models was used to test configural, metric, scalar, and residual invariance of the models in both samples. CFA results revealed that data from both the Hispanic/Latina and NHW groups fit the model adequately in this sample, which consisted of highly acculturated Hispanic/Latina college women. Tests of measurement invariance found that the SOI-R was invariant across Hispanic/Latina and NHW college women. However, questions about the development of the SOI-R and the underlying assumptions made during the course of its development might be considered prior to the use of the measure in research, and further invariance testing should be conducted in future work with less acculturated Hispanic/Latine populations.

Psychopathic Traits in Adult versus Adolescent Males: Measurement Invariance across the PCL-R and PCL:YV.

Both the Psychopathy Checklist-Revised (PCL-R) and the Psychopathy Checklist: Youth Version (PCL:YV), respectively, are established instruments for assessment of psychopathy and development of psychopathic propensity. To reliably compare scores from both instruments, measurement invariance must be established. The current study involved a combined sample of 1091 male participants (adults = 813; adolescents = 278) from correctional facilities in New Mexico. An exploratory structural equation modeling (ESEM) framework was used to test for measurement invariance. The four-factor ESEM model demonstrated good fit for the combined and individual samples. Results from the multiple group ESEM provide evidence for generally strong invariance, with equivalent factor loadings and thresholds. Adolescents exhibited decreased latent interpersonal traits but increased latent features on other PCL factors (affective, lifestyle, and antisocial) compared to adults. Findings suggest that the four-factor model and the measurement of psychopathic traits remain consistent across age groups. Implications of the findings within research and clinical contexts are discussed.