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男女の脳の配線と向き不向きの違い

脳の「配線」には男女差があるとする研究が注目を集めています。

男の脳は左右の半球での結合が多いのに対して、女の脳は左右の半球の結合が多く、「男は空間認識に優れ、女は言葉や顔の記憶等の“共感”に優れる」といったステレオタイプを裏付けるものです。

Ragini Verma, a researcher at the University of Pennsylvania, said the greatest surprise was how much the findings supported old stereotypes, with men's brains apparently wired more for perception and co-ordinated actions, and women's for social skills and memory, making them better equipped for multitasking.

Men tend to outperform women involving spatial tasks and motor skills - such as map reading - while women tend to better in memory tests, such as remembering words and faces, and social cognition tests, which try to measure empathy and “emotional intelligence”.

女の直観力は左右の結合の多さによるものと説明できます。

Because the female connections link the left hemisphere, which is associated with logical thinking, with the right, which is linked with intuition, this could help to explain why women tend to do better than men at intuitive tasks, she added.

“Intuition is thinking without thinking. It's what people call gut feelings. Women tend to be better than men at these kinds of skill which are linked with being good mothers,” Professor Verma said.

人間が遺伝的に異なることを頑なに認めず、ステレオタイプを批判してきた“political correct”な人々の反論を聞いてみたいものです。

生殖機能において、男女の脳には違いがあるが、いわゆる知的機能や認識、例えば言語能力、記憶力、理論形成力などでは、男女の脳に全く差がない。つまり、差はむしろ男女間というより個々人の間にある。

脳と性と能力 (集英社新書)

脳と性と能力 (集英社新書)

作りは違うのに機能は全く同一、ということがあり得るのでしょうか。