Testosterone levels and mental rotation performance in Chinese men

Area of Science:

• Cognitive Neuroscience
• Human Behavior
• Endocrinology

Background:

• Males generally outperform females on mental rotation tests (MRTs).
• The relationship between testosterone levels and MRT performance in males is inconsistent across studies.
• Previous research yielded conflicting results regarding testosterone's association with MRT performance metrics.

Purpose of the Study:

• To investigate the cross-cultural relationship between salivary testosterone levels and mental rotation test (MRT) performance.
• To replicate and extend previous findings on testosterone and MRTs in a Chinese male population.
• To explore the influence of cultural factors on the testosterone-MRT performance link.

Main Methods:

• Salivary testosterone levels and performance on the computerized Shepard and Metzler mental rotation test (SM) were measured in 92 heterosexual, right-handed Chinese men (aged 21-38).
• Response time and accuracy were analyzed in relation to angular disparity.
• Cross-cultural comparisons were made with previous studies of American and British men.

Main Results:

• Chinese men exhibited significantly longer response times but comparable accuracy compared to American men.
• Testosterone levels were significantly associated with the slope of the response time function in Chinese men.
• A significant association between testosterone and the intercept of the response time function was found in a prior American study, but not the slope.

Conclusions:

• Cultural differences in prioritizing speed versus accuracy may influence mental rotation test performance.
• The association between testosterone and MRT performance may be modulated by cultural factors.
• Future research should consider cultural values when examining testosterone's role in cognitive abilities like mental rotation.