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

The description of such characters as
thin-skinned is meant metaphorically,
but it turns out that it’s actually quite
literal. Among the tests researchers use
to measure personality traits are skin
conductance tests, which record how
much people sweat in response to
noises, strong emotions, and other
stimuli. High-reactive introverts sweat
more; low-reactive extroverts sweat
less. Their skin is literally “thicker,”
more impervious to stimuli, cooler to
the touch. In fact, according to some of
the scientists I spoke to, this is where
our notion of being socially “cool”
comes from; the lower-reactive you are,
the cooler your skin, the cooler you are.
(Incidentally, sociopaths lie at the extreme
end of this coolness barometer,
with extremely low levels of arousal,
skin conductance, and anxiety. There is
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