Personality-based latent classes of posttraumatic psychopathology: personality disorders and the internalizing/externalizing model

Prior research using the Brief Form of the Multidimensional Personality Questionnaire (MPQ-BF; Patrick, Curtin, & Tellegen, 2002) has shown evidence of 3 temperament-based subtypes--termed internalizing, externalizing, and simple PTSD--among individuals with symptoms of posttraumatic stress disorder (PTSD; Miller, Greif, & Smith, 2003). This study sought to replicate and extend research in this area by conducting a latent profile analysis of higher order temperament scales from the MPQ-BF using a new sample of 208 veterans with symptoms of PTSD. Results suggest that a 3-class solution reflecting internalizing, externalizing, and simple subtypes of posttraumatic psychopathology provided the best fit to the data. The externalizing subtype was characterized by features of antisocial, borderline, histrionic, and narcissistic personality disorders on the International Personality Disorder Examination (Loranger, 1999) as well as low levels of constraint and high levels of negative emotionality on the MPQ-BF. In contrast, individuals in the internalizing class exhibited features of schizoid and avoidant personality disorders, low levels of positive emotionality, and high levels of negative emotionality. The simple subtype was defined by low levels of comorbid personality disorder features and relatively normal personality profiles. Findings support the reliability of this typology and support the relevance of the internalizing and externalizing model to the structure of personality disorders.     

The Effects of Choice on the Reading Comprehension and Enjoyment of Children with Severe Inattention and no Attentional Difficulties

Research on Child and Adolescent Psychopathology - It has been proposed that enhancing motivation supports the learning of children with Attention Deficit Hyperactivity Disorder (ADHD). Less is...     

Sex differences in nonverbal behavior

A variety of nonverbal behaviors was coded from videotapes of 88 dyadic conversations. The 44 male and 44 female subjects were paired so that each participated in one conversation with a stranger of the same sex and one conversation with a stranger of the opposite sex. It was found that sex of subject, but not sex of partner, had a significant effect on many of the nonverbal behaviors displayed during the conversations. Subjects' scores on the behavioral measures were correlated with their scores on several personality measures and on a post-conversation questionnaire. Sex differences in these correlations were used to generate hypotheses linking specific behavioral differences between the sexes to more general differences between the masculine and feminine interpersonal styles.This study was supported in part by NSF grant GS-3033, awarded to Starkey Duncan, University of Chicago; by NSF grant GS-3127, awarded to Donald Fiske, University of Chicago; by a grant awarded to Starkey Duncan and Donald Fiske by the Social Science Divisional Research Committee of the University of Chicago; and by a University of Chicago Humanities Fellowship awarded to the author. The author is grateful to Starkey Duncan and Donald Fiske for the extensive assistance they provided with this study. The author also wishes to express her appreciation to Jeanine Carlson, George Niederehe, Bruno Repp, Thomas Shanks, and Cathy Stepanek, who assisted in coding the videotaped data and in the statistical analysis. This article is based on the author's doctoral dissertation (Beekman, 1973), which may be consulted for further details.Previous drafts of this article have been circulated under the author's former name, Susan J. Beekman.