The second digit to fourth digit (2D:4D) ratio, has been suggested to be responsible for many gender differences, including differences in cognitive functions. Visuospatial functions have been found to be better in men. However, reports are not consistent. Hence, we aimed to explore these issues in detail.
Methods: 2D: 4D ratios of right hand were calculated from scanned images. All participants performed a Mental Rotation task (MRT) using a computer based software and scores were recorded. Correlations between 2D:4D ratios and MRT scores were computed.
Results and conclusion: Men performed slightly better on the MRT. Scores declined with increases in 2D:4D ratios in men. An opposite pattern was seen in women. No correlations were found between 2D:4D and MRT scores, Visuospatial function is affected by, but not correlated with 2D:4D ratio. Other factors like age and education, may modify the effect of 2D:4D on visuospatial function.