David L. DiLalla

Domains of the childhood autism rating scale: Relevance for diagnosis and treatment

The Childhood Autism Rating Scale (CARS) was factor analyzed. Three factors emerged: Social Impairment (SI), Negative Emotionality (NE), and Distorted Sensory Response (DSR). Unit-weight factor scales showed moderates-to-good internal consistency. Cross-sectional analyses demonstrated that autistic (AUT) subjects were distinguished from subjects with pervasive developmental disorders (PDD) and nonpervasive developmental disorders (NPDD) by higher scores on SI. An SI cutoff score of 26 classified individuals as autistic vs. nonautistic with 78% accuracy. Longitudinal analyses showed that DSR was stable over 6 months of treatment, with little indication of symptom reduction. SI decreased over time across the diagnostic groups, but still showed significant continuity over the period. NE was most malleable and apparently sensitive to the effects of treatment.

Heritability of MMPI personality indicators of psychopathology in twins reared apart

This report presents Minnesota Multiphasic Personality Inventory (MMPI) findings from the Minnesota Study of Twins Reared Apart. Data from 65 unique pairs of monozygotic twins reared apart (MZA) and 54 unique pairs of dizygotic twins reared apart (DZA) were analyzed. As in other results from this sample, MZA twins evidenced substantial similarity, highlighting the influence of shared genes. Biometric modeling yielded estimates of heritability for the MMPIs standard validity and clinical scales and for the Wiggins content scales ranging from .26 to .62 (M = .44), echoing previous findings from the twin and adoption literature on personality. The pattern of MZA and DZA correlations suggested nonadditive genetic effects for 3 MMPI scales. Multivariate profile analyses also suggested genetic influence on both profile elevation and shape.

Joint Factor Structure of the Multidimensional Personality Questionnaire and the MMPI in a Psychiatric and High-Risk Sample

This study assessed aspects of the construct validity of the Multidimensional Personality Questionnaire (MPQ), a measure of normal personality characteristics, in a clinically relevant sample through joint factor analyses of primary and second-order scales of the MPQ and the Minnesota Multiphasic Personality Inventory (MMPI). A subsample from the Washington University Twin Study of Psychopathology was analyzed. The MPQs primary scales and higher order factors were found to have meaningful associations with MMPI scales that served as construct markers. The MPQ taps constructs related to, although not redundant with, those measured by the MMPI. Additionally, the MPQ provides a Constraint measure that is relevant to the study of psychopathy and not represented among the MMPI clinical scales. The potential utility of the MPQ in clinical settings as an adjunct to traditional assessment instruments such as the MMPI is discussed.

Dimensions of maltreated children's home behavior : a factor analytic approach

Abstract This study identified dimensions of home behavior of maltreating parents and their children through exploratory factor analysis. Five child factors were identified: self-directed behavior, affiliative behavior, negativity, positive social interaction, and questioning. Five parent factors were identified: positive social interaction, caretaking, discipline, refusal, and hostility. Multivariate analyses indicated that neglected children and abused children had less positive social interaction than adequately reared children. Children showed more questioning and less negativity at older ages. Abusing parents were most hostile, whereas neglecting parents showed the least positive social interaction. Abusing parents directed less hostility toward older children than the other child-rearing groups. Parents exhibited less caretaking behavior toward older children and directed more positive social interaction toward children with higher developmental quotients. The results suggest that factor analysis is a viable means of identifying dimensions of child and parent behavior which could facilitate comparison of effects across studies.

Gendered sexuality: a new model and measure of attraction and intimacy.

Currently, the literature related to sexual orientation is ambiguous with regard to the relationship of sexual orientation, sexual identity, attraction, and intimacy. In order to explore the relationships of self-identified categorical sexual identity (which is the most popular method of sexual orientation assessment) with attraction and intimacy, it is imperative that researchers have access to a reliable and valid measure of the latter. The present study proposes a model for conceptualizing attraction and intimacy, termed gendered sexuality, and examines the factor structure of a measure designed to assess the construct. Results suggest that four factors adequately accounted for the variance in gendered sexuality in a large sample of young adults. These factors assess attraction to females, attraction to males, intimacy with females, and intimacy with males. Exploratory analyses provided preliminary evidence of potential construct validity and suggested that discrepancies between desired and available behavior predict dissatisfaction in interpersonal role as measured by the Outcome Questionnaire 45.2.