According to Eysenck, the reason why some people seek out exciting new social and emotional experiences is that they:
A) require relatively high levels of stimulation to activate certain brain regions.
B) have low baseline adrenaline levels.
C) require relatively low levels of stimulation to activate certain brain regions.
D) have high baseline adrenaline levels.
Answer: A
Rationale: Hans Eysenck proposed that arousal states of the brain are the basis of extraversion and that the reactivity of the limbic system (the emotional circuits), reticular activating system, and cortex are correlated with extraversion. People who have decreased reactivity in these brain regions are basically "underaroused." As a consequence, they seek out novel social and emotional stimulation. Introverts, by comparison, have higher reactivity within these brain regions and, therefore, seek less stimulation than do extraverts.
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