Thomas Max Achenbach (1940-2023).

Memorializes Thomas Max Achenbach (1940-2023). He is known for groundbreaking contributions to developmental psychopathology, a field that was shaped in part by his 1974 book with that title, and for creating the Achenbach System of Empirically Based Assessment (ASEBA), arguably the world's most widely used suite of procedures for assessing child, youth, adult, and older adult strengths and emotional and behavioral problems. His research revealed robust broadband syndromes of psychopathology, giving rise to the terms "internalizing" and "externalizing." The Child Behavior Checklist, the first measure of the ASEBA suite, has been translated into more than 110 languages and is used in science and clinical service settings around the world. (PsycInfo Database Record (c) 2024 APA, all rights reserved).

Prospective associations of family conflict with alcohol expectancies in the adolescent brain cognitive development study: effects of race and ethnicity.

Introduction: Alcohol expectancies predict subsequent alcohol use and related problems among adolescents, although predictors of alcohol expectancies remain unclear. This study examined the longitudinal association between family conflict, a sociocultural factor strongly implicated in adolescent alcohol use, and positive and negative alcohol expectancies of adolescents of diverse racial/ethnic backgrounds. Methods: Data were from the Adolescent Brain Cognitive Development Study 4.0 release, a multisite longitudinal study (N = 6,231, baseline age 9-10). Linear mixed-effects regression, with interactions between race/ethnicity and family conflict, tested the association between family conflict and alcohol expectancies, for each racial/ethnicity (e.g., Black vs. non-Black; White vs. non-White). Results: Interactions of family conflict with race/ethnicity in predicting negative and positive alcohol expectancies were statistically significant for models testing Black and White adolescents, but not for Asian, Hispanic, and Other. Family conflict at baseline predicted lower negative alcohol expectancy for Black adolescents (B = -.166, p = 0.033) and positive alcohol expectancy for White adolescents (B = 0.71, p = 0.023) at the year 3 follow-up. All models controlled for sex, age, family socioeconomic status, alcohol expectancies at year 1, and family conflict at year 3. Conclusion: The results indicate that family conflict is a potential risk factor for problematic alcohol expectancies for Black and White adolescents. Although we did not directly compare Black and White adolescents, our findings indicate that family conflict may operate differently for Black and White adolescents. Prevention and intervention efforts targeting family conflict may be relevant for different aspects of alcohol expectancies in Black and White families.

Emotional and Behavioral Problem Profiles of Preteens With Self-Injurious Thoughts and Behaviors: A Multicultural Study.

OBJECTIVE: Self-injurious thoughts and behaviors (SITB) among preteen children have risen to the attention of researchers, practitioners, and policymakers. To shed light on potential treatment/prevention targets, we sought to identify empirically derived emotional and behavioral problem profiles of preteens with SITB, and to determine whether these profiles differ by age, gender and society. METHOD: Caregivers of 46,719 children aged 6 to 12 years from 42 societies across the world completed the Child Behavior Checklist for ages 6-18 (CBCL/6-18). There were 1,656 children whose caregivers indicated that their child experienced SITB. We conducted a latent profile analysis (LPA) using scores from eight CBCL/6-18 problem scales to derive problem profiles of children with SITB. Multilevel modelling was used to estimate differences in the profiles by SITB, society, sex, and age. RESULTS: A 4-profile model provided the best fit to the data, with profiles reflecting low problems (39.7%), mild problems (42.6%), moderate problems (15.4%), and rule-breaking/thought problems (2.3%). The low problems profile had CBCL problem scale scores nearly indistinguishable from those of children without SITB. Children in the rule-breaking/thought problems group were mostly female, whereas children in the other profile groups were mostly male. Children with the rule-breaking/thought problems profile also were most likely to have both suicidal thoughts and self-harm behaviors. CONCLUSION: Problem profiles of preteens with SITB are heterogeneous, with most having relatively low levels of other psychopathology. Selectively screening only children with clinically significant mental health problems for suicidal thoughts and self-harm behaviors (eg, asking about suicidal thoughts only among children with depression) risks missing many children experiencing SITB.

Cultural contributions to adults' self-rated mental health problems and strengths: 7 culture clusters, 28 societies, 16 906 adults.

BACKGROUND: It is unknown how much variation in adult mental health problems is associated with differences between societal/cultural groups, over and above differences between individuals. METHODS: To test these relative contributions, a consortium of indigenous researchers collected Adult Self-Report (ASR) ratings from 16 906 18- to 59-year-olds in 28 societies that represented seven culture clusters identified in the Global Leadership and Organizational Behavioral Effectiveness study (e.g. Confucian, Anglo). The ASR is scored on 17 problem scales, plus a personal strengths scale. Hierarchical linear modeling estimated variance accounted for by individual differences (including measurement error), society, and culture cluster. Multi-level analyses of covariance tested age and gender effects. RESULTS: Across the 17 problem scales, the variance accounted for by individual differences ranged from 80.3% for DSM-oriented anxiety problems to 95.2% for DSM-oriented avoidant personality (mean = 90.7%); by society: 3.2% for DSM-oriented somatic problems to 8.0% for DSM-oriented anxiety problems (mean = 6.3%); and by culture cluster: 0.0% for DSM-oriented avoidant personality to 11.6% for DSM-oriented anxiety problems (mean = 3.0%). For strengths, individual differences accounted for 80.8% of variance, societal differences 10.5%, and cultural differences 8.7%. Age and gender had very small effects. CONCLUSIONS: Overall, adults' self-ratings of mental health problems and strengths were associated much more with individual differences than societal/cultural differences, although this varied across scales. These findings support cross-cultural use of standardized measures to assess mental health problems, but urge caution in assessment of personal strengths.

The Vermont Family Based Approach in Primary Care Pediatrics: Effects on Children's and Parents' Emotional and Behavioral Problems and Parents' Health-Related Quality of Life.

This randomized controlled trial tested the Vermont Family Based Approach (VFBA) in primary care pediatrics. The VFBA is a model of healthcare delivery that shifts the focus from the individual to the family, emphasizes emotional and behavioral health, and uses evidence-based health promotion/prevention along with the treatment of emotional and behavioral problems. Participants were 81 families of 3-15-year-olds. For children, the VFBA was associated with greater reductions than the Control condition on the Child Behavior Checklist Emotionally Reactive, Withdrawn, Sleep Problems, Aggressive Behavior and Total Problems scales. For parents, the VFBA was associated with greater reductions than the Control condition on the Adult Self-Report Anxious/Depressed, Rule-Breaking Behavior, Internalizing Problems and Total Problems scales. The VFBA was also associated with greater improvement than the Control condition in the parents' health-related quality of life, as indicated by all scales of the Medical Outcomes Study Health Survey.

Associations of Parental Depression with Children's Internalizing and Externalizing Problems: Meta-Analyses of Cross-Sectional and Longitudinal Effects.

OBJECTIVE: Meta-analyses were used to test associations of parental depression with child internalizing and externalizing problems, based on 107 cross-sectional and 127 longitudinal effects for 164,047 parent-child pairs in 112 studies published between 2009 and 2020. METHOD: For each child, internalizing and externalizing problems were assessed with the same measure and source of data. Meta-analyses were conducted with random effects, multi-level Structural Equation Modeling with Bayesian estimation. RESULTS: Mean Pearson rs between parental depression and children's internalizing and externalizing problems were statistically significant in both cross-sectional (rs = .267 and .264) and longitudinal (rs = .207 and .194) analyses. The difference between the correlations of parental depression with internalizing versus externalizing problems was not statistically significant for cross-sectional or longitudinal effects. For both internalizing and externalizing problems, the cross-sectional correlation was significantly larger than the longitudinal correlation. Using the Lag as Moderator Meta-Analyses (LAMMA), evidence of a linear negative effect of the measurement interval between parental depression and child internalizing problems was found. In addition, several significant methodological moderators were found, with most implicating informant factors. Significant non-methodological moderators included the proportion of girls in a sample and children's White ethnicity. CONCLUSIONS: Overall, the study provided evidence of small but consistent associations between parental depression and child internalizing and externalizing problems, including that these associations are present over substantial periods of development.

Emotional Dysregulation in Adults from 10 World Societies: An Epidemiological Latent Class Analysis of the Adult-Self-Report.

Background/Objective: Emotional dysregulation (ED) is a dimensional psychological domain, previously operationalized by instruments of the Achenbach System of Empirically Based Assessment (ASEBA) for children and adolescents; however, its cross-cultural and bottom-up characteristics among adult populations are still unknown. Method: We examined scores obtained on the Adult Self-Report (ASR) by 9,238 18- to 59-year-olds from 10 societies that differed in social, economic, geographic, and other characteristics. A Latent Class Analysis was performed on the data from each society. Results: In each society, a dysregulated class (DYS) was identified, which was characterized by elevated scores on most ASR syndromes. The mean prevalence of DYS was 9.2% (6.1-12.7%). The best models ranged from three to five latent classes in the different societies. Conclusions: Although the number of identified classes and the prevalence of ED varied across societies, a DYS class was found in each society, suggesting the need to adopt a dimensional view of psychopathology and a cross cultural perspective also in adult populations.

Contexto/Objetivo: La desregulación emocional (DE) es un ámbito dimensional en Psicología, previamente operacionalizado por los instrumentos del Sistema de Evaluación Basado Empíricamente de Achenbach (ASEBA, por sus siglas en inglés) para niños y adolescentes; sin embargo, aún se desconocen sus características interculturales y su enfoque ascendente en su aplicación a la población adulta. Método: Examinamos las puntuaciones obtenidas en el Autoinforme de Adultos (ASR, por sus siglas en inglés) por 9.238 personas de 18 a 59 años de edad pertenecientes a 10 sociedades que diferían en cuanto a sus características sociales, económicas, geográficas y de otro tipo. Se realizó un Análisis de Clases Latentes con los datos de cada sociedad. Resultados: En cada sociedad se identificó una clase desregulada (DES), que se caracterizaba por puntuaciones elevadas en la mayoría de los síndromes ASR. La prevalencia media de DES fue del 9,2% (6,1-12,7%). Los mejores modelos oscilaron entre tres y cinco clases latentes en las diferentes sociedades. Conclusiones: Aunque el número de clases identificadas y la prevalencia de DE variaron entre las diversas sociedades, se encontró una clase DES en cada sociedad, lo que sugiere la necesidad de adoptar una visión dimensional de la psicopatología y una perspectiva intercultural también en las poblaciones adultas.

Effects of individual differences, society, and culture on youth-rated problems and strengths in 38 societies.

BACKGROUND: Clinicians increasingly serve youths from societal/cultural backgrounds different from their own. This raises questions about how to interpret what such youths report. Rescorla et al. (2019, European Child & Adolescent Psychiatry, 28, 1107) found that much more variance in 72,493 parents' ratings of their offspring's mental health problems was accounted for by individual differences than by societal or cultural differences. Although parents' reports are essential for clinical assessment of their offspring, they reflect parents' perceptions of the offspring. Consequently, clinical assessment also requires self-reports from the offspring themselves. To test effects of individual differences, society, and culture on youths' self-ratings of their problems and strengths, we analyzed Youth Self-Report (YSR) scores for 39,849 11-17 year olds in 38 societies. METHODS: Indigenous researchers obtained YSR self-ratings from population samples of youths in 38 societies representing 10 culture cluster identified in the Global Leadership and Organizational Behavioral Effectiveness study. Hierarchical linear modeling of scores on 17 problem scales and one strengths scale estimated the percent of variance accounted for by individual differences (including measurement error), society, and culture cluster. ANOVAs tested age and gender effects. RESULTS: Averaged across the 17 problem scales, individual differences accounted for 92.5% of variance, societal differences 6.0%, and cultural differences 1.5%. For strengths, individual differences accounted for 83.4% of variance, societal differences 10.1%, and cultural differences 6.5%. Age and gender had very small effects. CONCLUSIONS: Like parents' ratings, youths' self-ratings of problems were affected much more by individual differences than societal/cultural differences. Most variance in self-rated strengths also reflected individual differences, but societal/cultural effects were larger than for problems, suggesting greater influence of social desirability. The clinical significance of individual differences in youths' self-reports should thus not be minimized by societal/cultural differences, which-while important-can be taken into account with appropriate norms, as can gender and age differences.

Les progrès dans la réalisation de la classification quantitative de la psychopathologie.

Shortcomings of approaches to classifying psychopathology based on expert consensus have given rise to contemporary efforts to classify psychopathology quantitatively. In this paper, we review progress in achieving a quantitative and empirical classification of psychopathology. A substantial empirical literature indicates that psychopathology is generally more dimensional than categorical. When the discreteness versus continuity of psychopathology is treated as a research question, as opposed to being decided as a matter of tradition, the evidence clearly supports the hypothesis of continuity. In addition, a related body of literature shows how psychopathology dimensions can be arranged in a hierarchy, ranging from very broad "spectrum level" dimensions, to specific and narrow clusters of symptoms. In this way, a quantitative approach solves the "problem of comorbidity" by explicitly modeling patterns of co-occurrence among signs and symptoms within a detailed and variegated hierarchy of dimensional concepts with direct clinical utility. Indeed, extensive evidence pertaining to the dimensional and hierarchical structure of psychopathology has led to the formation of the Hierarchical Taxonomy of Psychopathology (HiTOP) Consortium. This is a group of 70 investigators working together to study empirical classification of psychopathology. In this paper, we describe the aims and current foci of the HiTOP Consortium. These aims pertain to continued research on the empirical organization of psychopathology; the connection between personality and psychopathology; the utility of empirically based psychopathology constructs in both research and the clinic; and the development of novel and comprehensive models and corresponding assessment instruments for psychopathology constructs derived from an empirical approach.

The generalizability of empirically derived syndromes of collateral-reported elder psychopathology across 11 societies.

The purpose of this study was to test whether a syndrome model of elder psychopathology derived from collateral ratings, such as from spouses and adult children, in the United States would be generalizable in 11 other societies. Societies represented South America, Asia, and Europe. The Older Adult Behavior Checklist (OABCL) was completed by collateral informants for 6141 60- to 102-year-olds. The tested model comprised syndromes designated as Anxious/Depressed, Worries, Somatic Complaints, Functional Impairment, Memory/Cognition Problems, Thought Problems, and Irritable/Disinhibited. The model was tested using confirmatory factor analyses in each society separately. The primary model fit index showed a good fit for all societies, while the secondary model fit indices showed acceptable to a good fit for all societies. The items loaded strongly on their respective factors, with a median item loading of 0.69 across the 11 societies. By syndrome, the overall median item loadings ranged from 0.47 for Worries to 0.77 for Functional Impairment. The OABCL syndrome structure was thus generalizable across the tested societies. The OABCL can be used for broad assessment of psychopathology for elders of diverse backgrounds in nursing services and research.

Latent Class Analysis of the CBCL Dysregulation Profile for 6- to 16-Year-Olds in 29 Societies.

Objective: We used latent class analysis (LCA) to examine the prevalence and characteristics of the Dysregulation Profile (DP) based on data from the Child Behavior Checklist for Ages 6-18. The DP comprises elevated scores on the Anxious/Depressed, Attention Problems, and Aggressive Behavior syndromes and thus reflects significant problems in self-regulation of mood, attention, and behavior.Method: We examined CBCL data for 56,666 children ages 6 to 16 in 29 societies, many of which are countries but some of which are not (e.g., Hong Kong, Puerto Rico). The 29 societies varied widely in race/ethnicity, religion, geographic location, political/economic system, and population size.Results: The various statistical indices for good LCA model fit, while not always consistent, supported a DP class in every society. The omnicultural mean probability of assignment to the DP class (mean of the societal means) was 93% (SD = 2.4%). Prevalence of the DP class ranged from 2% to 18% across societies, with an omnicultural mean prevalence of 9%. In every society, the DP class had significantly higher scores than the pooled non-DP classes on all three DP syndromes. The 8-syndrome T score profile for the DP class in many societies featured elevations on all eight CBCL syndromes.Conclusions: Although the same instrument, analytic procedures, and decision rules were used in these 29 samples, model fit, the number of classes, and the prevalence of the DP class varied across societies. High scores on the three DP syndromes often co-occurred with high scores on most other CBCL syndromes.

Sport participation moderates association between bullying and depressive symptoms in Italian adolescents.

BACKGROUND: A high rate of bullying episodes has been reported in Italian schools, as well as its association with psychopathology in adolescents. However, information regarding moderators of this interaction are still lacking. This study explored whether gender, exercise frequency, and sport participation exerted a protective effect on the association between bullying and depressive symptoms in Italian students. METHODS: Researchers obtained data from 4,829 Italian youth ages 13 to 21 using the self-report Epidemiologia dell'Infortunistica Stradale survey (EDIT) developed by the Regional Health Agency of Tuscany, Italy. Three structural equation models were run to assess moderators of the association between bullying and depressive symptoms. Moderators examined in the models included gender, exercise frequency, and sport participation. RESULTS: The association between bullying and depressive symptoms was stronger for females (B=0.95, SE=0.04, p< .001) than for males (B=0.45, SE=0.00, p< .001) and for students who did not play sports (B=0.74, SE=0.09, p< .001) than for those who played sports (B=0.61, SE=0.06, p< .001). Females may be more affected by the depressive effects of bullying than males. CONCLUSIONS: Participation in sports buffers against the effects of bullying and may prove a helpful strategy for increasing exercise, positive peer interactions, and mood in adolescents. LIMITATIONS: The cross-sectional nature of the study, the possible role of BMI as a confounding factor and the use of a not widely used measure of depression.

The generalizability of Older Adult Self-Report (OASR) syndromes of psychopathology across 20 societies.

OBJECTIVES: As the world population ages, psychiatrists will increasingly need instruments for measuring constructs of psychopathology that are generalizable to diverse elders. The study tested whether syndromes of co-occurring problems derived from self-ratings of psychopathology by US elders would fit self-ratings by elders in 19 other societies. METHODS/DESIGN: The Older Adult Self-Report (OASR) was completed by 12 826 adults who were 60 to 102 years old in 19 societies from North and South America, Asia, and Eastern, Northern, Southern, and Western Europe, plus the United States. Individual and multigroup confirmatory factor analyses (CFAs) tested the fit of the seven-syndrome OASR model, consisting of the Anxious/Depressed, Worries, Somatic Complaints, Functional Impairment, Memory/Cognition Problems, Thought Problems, and Irritable/Disinhibited syndromes. RESULTS: In individual CFAs, the primary model fit index showed good fit for all societies, while the secondary model fit indices showed acceptable to good fit. The items loaded strongly on their respective factors, with a median item loading of .63 across 20 societies, and 98.7% of the loadings were statistically significant. In multigroup CFAs, 98% of items demonstrated approximate or full metric invariance. Fifteen percent of items demonstrated approximate or full scalar invariance, and another 59% demonstrated scalar invariance across more than half of societies. CONCLUSIONS: The findings supported the generalizability of OASR syndromes across societies. The seven syndromes offer empirically based clinical constructs that are relevant for elders of different backgrounds. They can be used to assess diverse elders and as a taxonomic framework to facilitate communication, services, research, and training in geriatric psychiatry.

Correspondence Between Perceived Pubertal Development and Hormone Levels in 9-10 Year-Olds From the Adolescent Brain Cognitive Development Study.

Aim: To examine individual variability between perceived physical features and hormones of pubertal maturation in 9-10-year-old children as a function of sociodemographic characteristics. Methods: Cross-sectional metrics of puberty were utilized from the baseline assessment of the Adolescent Brain Cognitive Development (ABCD) Study-a multi-site sample of 9-10 year-olds (n = 11,875)-and included perceived physical features via the pubertal development scale (PDS) and child salivary hormone levels (dehydroepiandrosterone and testosterone in all, and estradiol in females). Multi-level models examined the relationships among sociodemographic measures, physical features, and hormone levels. A group factor analysis (GFA) was implemented to extract latent variables of pubertal maturation that integrated both measures of perceived physical features and hormone levels. Results: PDS summary scores indicated more males (70%) than females (31%) were prepubertal. Perceived physical features and hormone levels were significantly associated with child's weight status and income, such that more mature scores were observed among children that were overweight/obese or from households with low-income. Results from the GFA identified two latent factors that described individual differences in pubertal maturation among both females and males, with factor 1 driven by higher hormone levels, and factor 2 driven by perceived physical maturation. The correspondence between latent factor 1 scores (hormones) and latent factor 2 scores (perceived physical maturation) revealed synchronous and asynchronous relationships between hormones and concomitant physical features in this large young adolescent sample. Conclusions: Sociodemographic measures were associated with both objective hormone and self-report physical measures of pubertal maturation in a large, diverse sample of 9-10 year-olds. The latent variables of pubertal maturation described a complex interplay between perceived physical changes and hormone levels that hallmark sexual maturation, which future studies can examine in relation to trajectories of brain maturation, risk/resilience to substance use, and other mental health outcomes.

The CBCL/1½-5's DSM-ASD Scale: Confirmatory Factor Analyses Across 24 Societies.

Previous research supports the CBCL/1½-5's DSM-ASD scale (and its precursor, the DSM-PDP scale) as a Level 1 ASD screener. Confirmatory factor analyses (CFAs) with data from population samples in 24 societies (N = 19,850) indicated good measurement invariance across societies, especially for configural and metric invariance. Items 4. 25, 67, 80, and 98 may be especially good discriminators of ASD because they have tend to have low base rates, strong loadings on the ASD latent construct, and the best measurement invariance across societies. Further research is needed to test the discriminative power of these items in predicting ASD, but our strong measurement findings support the international psychometric robustness of the CBCL/1½-5's DSM-ASD scale.

International Comparisons of Emotionally Reactive Problems in Preschoolers: CBCL/1½-5 Findings from 21 Societies.

Our goal was to conduct international comparisons of emotion regulation using the 9-item Emotionally Reactive (ER) syndrome of the Child Behavior Checklist for Ages 1½-5. We analyzed parent ratings for 17,964 preschoolers from 21 societies, which were grouped into 8 GLOBE study culture clusters (e.g., Nordic, Confucian Asian). Omnicultural broad base rates for ER items ranged from 8.0% to 38.8%. Rank ordering for mean item ratings varied widely across societies (omnicultural Q = .50) but less so across culture clusters (M Q = .66). Societal similarity in mean item rank ordering varied by culture cluster, with large within-cluster similarity for Anglo (Q = .96), Latin Europe (Q = .74), Germanic (Q = .77), and Latin American (Q = .76) clusters, but smaller within-cluster similarity for Nordic, Eastern Europe, and Confucian Asian clusters (Qs = .52, .23, and .44, respectively). Confirmatory factor analyses of the ER syndrome supported configural invariance for all 21 societies. All 9 items showed full to approximate metric invariance, but only 3 items showed approximate scalar invariance. The ER syndrome correlated . 65 with the Anxious/Depressed (A/D) syndrome and .63 with the Aggressive Behavior syndrome. ER items varied in base rates and factor loadings, and societies varied in rank ordering of items as low, medium, or high in mean ratings. Item rank order similarity among societies in the same culture cluster varied widely across culture clusters, suggesting the importance of cultural factors in the assessment of emotion regulation in preschoolers.

Redefining phenotypes to advance psychiatric genetics: Implications from hierarchical taxonomy of psychopathology.

Genetic discovery in psychiatry and clinical psychology is hindered by suboptimal phenotypic definitions. We argue that the hierarchical, dimensional, and data-driven classification system proposed by the Hierarchical Taxonomy of Psychopathology (HiTOP) consortium provides a more effective approach to identifying genes that underlie mental disorders, and to studying psychiatric etiology, than current diagnostic categories. Specifically, genes are expected to operate at different levels of the HiTOP hierarchy, with some highly pleiotropic genes influencing higher order psychopathology (e.g., the general factor), whereas other genes conferring more specific risk for individual spectra (e.g., internalizing), subfactors (e.g., fear disorders), or narrow symptoms (e.g., mood instability). We propose that the HiTOP model aligns well with the current understanding of the higher order genetic structure of psychopathology that has emerged from a large body of family and twin studies. We also discuss the convergence between the HiTOP model and findings from recent molecular studies of psychopathology indicating broad genetic pleiotropy, such as cross-disorder SNP-based shared genetic covariance and polygenic risk scores, and we highlight molecular genetic studies that have successfully redefined phenotypes to enhance precision and statistical power. Finally, we suggest how to integrate a HiTOP approach into future molecular genetic research, including quantitative and hierarchical assessment tools for future data-collection and recommendations concerning phenotypic analyses. (PsycINFO Database Record (c) 2020 APA, all rights reserved).

Are fit indices used to test psychopathology structure biased? A simulation study.

Structural models of psychopathology provide dimensional alternatives to traditional categorical classification systems. Competing models, such as the bifactor and correlated factors models, are typically compared via statistical indices to assess how well each model fits the same data. However, simulation studies have found evidence for probifactor fit index bias in several psychological research domains. The present study sought to extend this research to models of psychopathology, wherein the bifactor model has received much attention, but its susceptibility to bias is not well characterized. We used Monte Carlo simulations to examine how various model misspecifications produced fit index bias for 2 commonly used estimators, WLSMV and MLR. We simulated binary indicators to represent psychiatric diagnoses and positively skewed continuous indicators to represent symptom counts. Across combinations of estimators, indicator distributions, and misspecifications, complex patterns of bias emerged, with fit indices more often than not failing to correctly identify the correlated factors model as the data-generating model. No fit index emerged as reliably unbiased across all misspecification scenarios. Although, tests of model equivalence indicated that in one instance fit indices were not biased-they favored the bifactor model, albeit not unfairly. Overall, results suggest that comparisons of bifactor models to alternatives using fit indices may be misleading and call into question the evidentiary meaning of previous studies that identified the bifactor model as superior based on fit. We highlight the importance of comparing models based on substantive interpretability and their utility for addressing study aims, the methodological significance of model equivalence, as well as the need for implementation of statistical metrics that evaluate model quality. (PsycINFO Database Record (c) 2019 APA, all rights reserved).