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The brain controls the behavior of individuals, but it is influenced by genes, hormones and evolution. Evidence has shown that the ways that male and female children become adults is different, and that there are variations between the individuals of each sex. [121] [better source needed]
Gender roles are culturally influenced stereotypes which create expectations for appropriate behavior for males and females. [1] [2] [3] An understanding of these roles is evident in children as young as age four. [4] Children between 3 and 6 months can form distinctions between male and female faces. [5]
Furthermore, male advantage in spatial abilities can be accounted for by their greater ability in spatial working memory. [7] Sex differences in mental rotation also reaches almost a single deviation (1.0) when the tasks require navigation, as found in one study with participants who used Oculus Rift in a virtual environment. [51]
The development of sexual differences begins with the XY sex-determination system that is present in humans, and complex mechanisms are responsible for the development of the phenotypic differences between male and female humans from an undifferentiated zygote. [3]
Structurally, adult male brains are on average 11–12% heavier and 10% bigger than female brains. [21] Though statistically there are sex differences in white matter and gray matter percentage, this ratio is directly related to brain size, and some [ 22 ] argue these sex differences in gray and white matter percentage are caused by the average ...
The human brain. Differences in male and female brain size are relative to body size. [83] Early research into the differences between male and female brains showed that male brains are, on average, larger than female brains. This research was frequently cited to support the assertion that women are less intelligent than men.
Sexual differentiation is the process of development of the sex differences between males and females from an undifferentiated zygote. [1] [2] Sex determination is often distinct from sex differentiation; sex determination is the designation for the development stage towards either male or female, while sex differentiation is the pathway towards the development of the phenotype.
Studies have shown that "fewer gender differences in emotion expression may be found when children are with someone they trust and know well than when children are with an unfamiliar person". [14] Generally, people are trained to behave in a "socially acceptable" way around strangers or acquaintances, suggesting that the social context of an ...