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Biosocial factors, sexual orientation and neurocognitive functioning
Qazi Rahman1, Glenn D Wilson, Sharon Abrahams
1Department of Psychology, Institute of Psychiatry, King's College-University of London, De Crespigny Park, London, SE5 8AF, UK. q.rahman@uel.ac.uk
Psychoneuroendocrinology
|June 5, 2004
Summary
Cognitive performance differences between heterosexual and homosexual individuals are primarily linked to sex and sexual orientation, not prenatal hormone indicators. Psychological gender also played a minor role in specific cognitive tasks.
Area of Science:
- Cognitive Psychology
- Neuroscience
- Human Sexuality
Background:
- Sexual orientation and cognitive performance differences are hypothesized to stem from prenatal factors or gender role learning.
- Understanding these influences is crucial for comprehending human cognitive diversity.
Purpose of the Study:
- To investigate the predictors of cognitive performance differences between heterosexual and homosexual males and females.
- To examine the roles of sex, sexual orientation, psychological gender, and prenatal factors in cognitive variations.
Main Methods:
- A battery of cognitive tasks (mental rotation, JLO, verbal fluency, perceptual speed, object location memory) was administered to 240 participants.
- Data on psychological gender, birth order, sibling sex composition, and 2nd to 4th finger length ratios were collected.
Main Results:
- Sex and sexual orientation were the strongest predictors of cognitive performance, with IQ also being significant.
- Psychological gender explained a small but significant portion of variance in mental rotation and perceptual speed.
- Prenatal hormone indicators (finger ratios, birth order, sibling composition) did not independently predict cognitive performance.
Conclusions:
- Cognitive differences between heterosexual and homosexual individuals are predominantly explained by sex and sexual orientation.
- Biosocial influences, particularly sex and sexual orientation, are key factors in cognitive performance variations, with limited contribution from traditional prenatal hormone markers.