PSYC 305 Lecture Notes - Lecture 2: Interpersonal Circumplex, Monoamine Oxidase, Psychoticism
Document Summary
Eysenck: introverts chronically experience more cortical arousal than extraverts, therefore avoid stimulation. Research indicates that introverts are more reactive to moderate levels of stimulation than extraverts. Difference is in arousability of cns, not baseline activity. Eysenck: neuroticism is associated with increased reactivity of limbic system and low tolerance for stress- ans is more easily activated. Research indicated that high neuroticism is associated with increased psychological and physiological reactivity (e. g. skin conductance) Eysenck: psychoticism is associated with high levels of testosterone and low levels of monoamine oxidase (mao), an enzyme that regulates neurotransmitters. Research supports correlations with high testosterone and low mao (low levels of mao are associated with high sensation-seeking and impulsivity- need for more stimulation to reach optimal arousal); also excessive dopamine activity. Not all-inclusive: other empirical studies have found more than 3 factors. An alternative biopsychological theory of personality: gray"s reinforcement sensitivity theory.
