Sex differences in Cloninger's temperament dimensions--a meta-analysis

Area of Science:

• Psychology and Personality Research
• Behavioral Science

Background:

• Numerous studies have explored psychological and personality differences between men and women.
• Cloninger's Tridimensional Personality Questionnaire and Temperament and Character Inventory measure four temperament dimensions: novelty seeking, harm avoidance, reward dependence, and persistence.
• Previous research on sex differences in these dimensions has yielded inconsistent results, lacking a comprehensive meta-analysis.

Purpose of the Study:

• To conduct a meta-analysis to estimate sex differences in Cloninger's four temperament dimensions.
• To investigate the influence of sample mean age and study location (Asia vs. other) on observed sex differences.

Main Methods:

• Systematic collection of studies on healthy populations with a minimum sample size of 100.
• Application of meta-analytic methods to pool effect sizes for sex differences across 32 eligible studies.
• Analysis of moderating effects of sample age and study location.

Main Results:

• Women scored significantly higher in reward dependence (Cohen's d = -0.63) and harm avoidance (d = -0.33).
• No significant sex differences were found in novelty seeking (d = -0.04) or persistence (d = -0.02).
• The effect size for reward dependence was smaller in Asian studies compared to other locations.

Conclusions:

• This meta-analysis provides the first pooled estimates of sex differences in Cloninger's temperament dimensions.
• Consistent higher scores in harm avoidance among women support the validity of this dimension, especially when considering related traits like depression.
• Findings highlight the need to consider these sex differences in future research utilizing these personality instruments.