The present study compared the fit of several IRT models to two personality assessment instruments. Data from 13,059 individuals responding to the US-English version of the Fifth Edition of the Sixteen Personality Factor Questionnaire (16PF) and 1,770 individuals responding to Goldberg's 50 item Big Five Personality measure were analyzed. Various issues pertaining to the fit of the IRT models t...

The first part of this article describes a study of the relationships between personality and risk-taking in six areas: smoking, drinking, drugs, sex, driving, and gambling. The participants, 260 college students, were given self-report measures of risky behaviors in each of the six areas and the Zuckerman-Kuhlman five-factor personality questionnaire. Generalized risk-taking (across all six ar...

introduction : the aim of this study is to investigate the relationship between the dimensions of perfectionism and abnormal personality dimensions introduced in the fifth edition of diagnostic and statistical manual of mental disorders, and to address this issue that to what extent each personality dimension can predict the dimensions of to perfectionism. method: the present study is descripti...

This essay assesses the two most significant changes in psychology over the past century: the attempt to localize psychological phenomena in restricted brain sites and the search for genetic contributions to behavior and psychopathology. Although there are advantages to these new developments, they are accompanied by some questionable assumptions. Because the investigators in these domains ofte...

Personality research is usually perceived as lying towards the " softer " end of psychological inquiry, seemingly far from the " harder " neural mechanisms, processes, and neurological lesions which are the daily stuff of neuropsychology. As biologically-oriented personality psychologists, however, we have always tried to couch our proposals in brain-behavioural terms and have even offered sugg...