PSYCH 2B03 Lecture : Lecture 26 PSYCH 2B03.docx

• School: McMaster University
• Department: Psychology
• Course: PSYCH 2B03
• Professor: Richard B Day

Document Summary

Possible reason for extroversion: north americans are the ones that migrated here in the first place, so they are more adventurous and therefore extroverted. Another reason: extroversion is rewarded in na but not asian countries. Gene expression can change with age, and traits can therefore change as well. Have demonstrated consistency in the factors through age. Can find them in many different situations and relationships between people. Can find them in many different languages and cultures. Like eysenck"s personality test in terms of methodology. Did not include a and c at first. Study impulsive-sensation seeking: like extroversion in a way. His data converged on 5 factors that are not exactly the same: sociability, neuroticism/anxiety, impulsive-sensation seeking (like extroversion/introversion, conscientiousness, aggression hostility (like agreeableness, activity (seeking activity, restlessness) Measured blood platelet mao -> low levels of brain mao -> higher levels dopamine, which is broken down by mao -> sensation seeking, extroversion, etc.