PSY230H5 Lecture Notes - Lecture 13: Reticular Formation, Extraversion And Introversion, Cortisol
Document Summary
Hans eysenck discovered extraversion and neuroticism; conducted some of the first twin studies to show heritability of extraversion and neuroticism- first neurological theory of extraversion and neuroticism. Cortical arousal- overall activity in brain and experiences of alertness; this structure is called the ascending. Personality and biology reticular activating system (aras: eysenck speculated that aras could explain variation in extraversion. Evidence some evidence supports hypothesis that extraverts prefer more arousing stimuli than introverts. Due to lack of evidence, the optimal arousal theory is not used to explain individual differences in extraversion. Thayer: two types of arousal- energetic (varies from sleepy to being wide awake) and tense (varies from being theory based on outdated model of arousal as a single dimension calm to being tense) Theory assumes moderate levels of arousal are optimal and are experienced as pleasurable.
