Why Am I Introverted?
others. What makes introverts develop defining traits such as introspection and reservedness?
The amygdala processes the emotions you feel and allows you to discern those of others while the
nucleus accumbens is a component of our pleasure and reward system. Aversive stimuli drives
dopamine levels down in the nucleus accumbens while reinforcing stimuli results in an increase.
People try to avoid aversive stimuli as it’s associated with punishment but might actively seek out
reinforcing stimuli as the action that induces it provides a reward.
of introverts and extroverts in 2005 by way of personality profiling, genetic analysis, and brain
scanning. The volunteers placed gambles while in the scanner. Cohen’s results supported his
hypothesis that the two aforementioned personality types process rewards in different ways due to
their different responses to stimuli. Imaging displayed that extroverts’ amygdala and accumbens were
more active in comparison with the introverts’ if their gambling exercise proved successful.
dopamine. Psychologist Hans Eysenck suggested that extroverts have a relatively lower basic rate of
arousal in the 1960’s. They essentially need to seek out risk and the company of others in order to feel
as stimulated as an introvert might feel with, for example, a good book. Introverts thrive in
comfortable and calculable scenarios because of their easily excited dopamine system.
conducted research to answer the question: do extroverts have different responses to stimuli that
pertains to social situations? Participants were shown images that incited a P300 change in their
brain's electrical activity. P300 is the reaction to a stimulus and displays how the stimulus is
categorized and processed as well as how much time it took for an individual to recognize a change in
their environment. The results were collected using EEG. Fishman would show the volunteers a
series of images that included an 'odd one out' such as an array of male faces occasionally followed by
a female face. The more extroverted participants had higher P300 responses to the pictures of faces.
Conversely, introverts' responses to faces and inanimate objects, such as flowers, resembled each
other more closely. These findings suggested that introverts were less responsive to social stimuli than
It's all about how you're wired. Maybe forward this blog post to the extroverts in your life that are
concerned about your tendency to stay confined in your room? Not your teachers, there's no way to
get out of class presentations.