quiet-the-power-of-introverts-in-a-world-that-cant-stop-talking-susan-cain

Stephen Suomi, the scientist who
conducted these studies, has speculated
that these high-reactive monkeys owed
their success to the enormous amounts
of time they spent watching rather than
participating in the group, absorbing on
a deep level the laws of social dynamics.
(This is a hypothesis that might
ring true to parents whose high-reactive
children hover observantly on the edges
of their peer group, sometimes for
weeks or months, before edging successfully
inside.)
Studies in humans have found that
adolescent girls with the short allele of
the SERT gene are 20 percent more
likely to be depressed than long-allele
girls when exposed to stressful family
environments, but 25 percent less likely
to be depressed when raised in stable
homes. Similarly, short allele adults
have been shown to have more anxiety
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