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Mental Rotation Performance in Females Increased by Male Twin Sibling

by Kathy Jones on  September 9, 2010 at 7:34 PM Research News   - G J E 4
A new study has revealed that females with a male co-twin score higher on mental rotation task than females with a female co-twin.

Mental rotation tasks are tests that require rotation of three-dimensional objects in mental space.
 Mental Rotation Performance in Females Increased by Male Twin Sibling
Mental Rotation Performance in Females Increased by Male Twin Sibling
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The study revealed that females with exposure to higher levels of prenatal testosterone might perform better than females with lower levels of testosterone.

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"If prenatal masculinization does occur in female twins from opposite-sex pairs, it would be expected to be most evident in behaviours that are related to testosterone levels and show a large and robust male advantage, such as the mental rotation task," said Eero Vuoksimaa from the University of Helsinki.

They compared mental rotation task scores between twins from same-sex and opposite-sex pairs and found that females with a male co-twin scored higher than did females with a female co-twin.

Vuoksimaa and colleagues noted that it is unclear if differences in performance are due to prenatal exposure to testosterone or due to their tendency to engage in more male-typical activities.

"More research is needed to disentangle the origins of the masculinization of mental rotation performance in females with a male co-twin," Vuoksimaa concluded.

The study is published in Psychological Science.

Source: ANI
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