کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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921250 | 920762 | 2011 | 4 صفحه PDF | دانلود رایگان |
Men outperform women in mental rotation by about one standard deviation. Prenatal exposure to testosterone has been suggested as one cause. In animals it has been shown that a female fetus located between two male ones is exposed to higher levels of testosterone. It is still unclear whether intra-uterine hormone transfer exists in humans. Therefore, the influence of an intra-uterine presence of a male co twin was studied in female fraternal twins (N = 200). Women with a male co-twin outperformed women with a female co-twin by about a third standard deviation. In a no-twin control group (N = 200), performance of women with a slightly older sibling did not depend upon the sibling's sex. These findings provide preliminary support for the theory of an influence of prenatal testosterone on mental rotation performance.
Research highlights▶ Men outperform women in mental rotation, due to prenatal testosterone exposure. ▶ Does intra-uterine hormone transfer from a male co-twin exists in humans? ▶ Women with a male co-twin outperformed women with a female co-twin. ▶ Performance of women with an older sibling did not depend upon the sibling's sex. ▶ These findings provide support for the prenatal testosterone thory.
Journal: Biological Psychology - Volume 86, Issue 1, January 2011, Pages 90–93