The Darwinian theory of sexual selection predicts languagerelated sex differences in humans originating from and relevant for mate choice. Due to past sex-different selection pressures, it can be assumed that men are more prone to verbal displays than women, both in intrasexual competition and in intersexual selection (i.e., courtship). They should benefit more from high verbal proficiency in m...

OBJECTIVE We examine whether having an affair around the time a marriage broke up is associated with being the person who wanted the divorce more or the person who was left. We also examine predictors of having an affair around the end of the marriage. METHODS We use the National Survey of Families and Households, using each ex-spouse's reports of which spouse wanted the divorce more and whet...

A psychoticism questionnaire developed by the authors (Arora & Varma, 1980 a, b) was administered to 100 psychotics, 100 neurotics, 100 relatives of psychotics, and 100 normals. Relationship of P-score with six socioeconomic variables, i.e., age, sex, education, occupation, religion and urban, rural background was studied. P-score was found to be higher in younger age group (15-24 years) in eac...

This study examined the development of school performance-related beliefs and their link with actual academic performance in Moscow children (Grades 2-6, N=55l) using the Control, Agency and Means-Ends Interview (CAMI). Results revealed much intercultural convergence with Western samples, coupled with context-specific variations. Similarities involved (a) the CAMI factor structure, (b) the corr...

PURPOSE The purposes of this study were to determine i) if there is a sex difference in the age of the elite marathon runners and ii) if the sex difference in performance altered across the years that women have participated in the marathon. METHODS Age at time of competition and running times of the first five placed male and female runners who competed in the seven marathons of the World Ma...

This research reports on a conceptually and methodologically innovative study, which sought to measure the influence of gender on interpersonal distance. In so doing, we argue for an important distinction to be made between biological sex, gender role, and sexuality. To date, however, progress in the study of interpersonal distance (IPD) has been inhibited by poor operational definitions and in...

The purpose of this study was to collect normative data on and to assess the clinical usefulness of scales designed to measure the quality of children's ability to perform three bilateral motor coordination tasks: jumping jacks, symmetrical stride jumps, and reciprocal stride jumps. One hundred children, aged 5 to 9 years, were tested according to the scales developed for this study. Results in...