Genetic and environmental contributions to variance in age at first sexual intercourse
Article Abstract:
Age at first sexual intercourse is probably greatly influenced in modern times by psychological and biological factors that are partly controlled genetically because social constraints are less than before. Influences on the age of commencement of sexual activity appear to have been different among research subjects aged 41- to 70-years-old than for those aged under 40. Age at first intercourse correlated lower for nonidentical twins than identical twins, with the variance more genetically affected for twins aged under 40 than for those aged 41-70.
Publication Name: Psychological Science
Subject: Psychology and mental health
ISSN: 0956-7976
Year: 1997
User Contributions:
Comment about this article or add new information about this topic:
Genetic influence on risk of divorce
Article Abstract:
The influence of genetic factors on the risk ofdivorce was studied in monozygotic and dizygotic twins, their parents and the parents of the twins' spouses. Results show that the concordance rate for divorce was higher in monozygotic than in dizygotic twins. Divorce may also have been the result of characteristics that the two spouses bring to the marriage than to interaction effects. Adjustment difficulties seen in some children of divorced parents are due to the interaction of both genetic and environmental factors.
Publication Name: Psychological Science
Subject: Psychology and mental health
ISSN: 0956-7976
Year: 1992
User Contributions:
Comment about this article or add new information about this topic:
Effect of group performance on subsequent individual performance: does influence generalize beyond the issues discussed by the group?
Article Abstract:
Group discussion does affect members' process of making judgments rather than that they just change their public judgment to stick to the group norm for relayed topics as well as those covered in the discussion. This study extends the research on discussion group members' judgment process changes to include issues not specifically covered in the group discussion.
Publication Name: Psychological Science
Subject: Psychology and mental health
ISSN: 0956-7976
Year: 1995
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Belief systems and the analytic work. Jung's contribution to the evolving concept of self. Conflict and deficit: toward an integrative vision of the self
- Abstracts: Nurses' and patients' perceptions of the social climate in a forensic unit in Wales
- Abstracts: Adolescent girls' constructions of smoking identities: implications for health promotion. Perception of discrimination and ethnocultural variables in a diverse group of adolescents
- Abstracts: The influence of endowments asymmetry and information level on the contribution to a public step good. The influence of place attachment on recreation demand
- Abstracts: MMPI-2 findings in schizophrenia and depression. Automatic and controlled processes in the analysis of hierarchical structure