Extras - Extras chapter 6(pgs 124-138 Eysenck’s theory extraverts di f er from introverts because of di f erences in their physiological level of

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Unformatted text preview: Extras! chapter 6 (pgs 124-138)- Eysenck’s theory: extraverts di f er from introverts because of di f erences in their physiological level of arousal (LOA) in the brain; these di f erences are inFuenced by the ascending reticular activation system of the brain (ARAS)- the system believed to regulate overall arousal in the cortex.- introverts need only small amounts of stimulation to overstimulate them psychologically, which then leads them to become distressed and withdrawn in their behavior.- in extroverts the ARAS is not easily stimulated, which leads them to seek activities that will increase the level of stimulation. - Hebb: Optimal Level of Arousal (OLA)- arousal level that is most appropriate for doing a given task e f ectively; too much or too little arousal undermines performance.- Geen did experiment that supported Eysenck’s theory- performance was poorer when extraverts worked under the lower stimulation conditions preferred by the introverts and vice versa.- People di f er consistently in the degree to which the right versus the left sides of their brains are activated (known as brain symmetry).- ¡indings on BAS and BIS and brain symmetry suggest that these are speci¢c and distinct incentive and threat systems in the brain that are responsive, respectively, to environmental signals of reward and threat, and that are related, respectively, to positive and negative mood.- there are clear and meaningful speci¢c links between people’s characteristic brain activities and their characteristic emotional and behavioral reaction patterns to di f erent types of positive and negative stimulation. - Behavioral Inhibition System (BIS): causes individuals to withdraw from certain undesirable stimuli or punishments and thus inhibits behavior.- enhances attention to threats and risks and possible punishment and is adaptive to humans because it is useful for avoiding danger and for surviving. - linked to introversion and anxiety; conscientiousness/behavioral inhibition.- Behavioral Activation System (BAS): directs individuals toward certain desirable goals or incentives and thus activates and facilitates rapid action. - facilitates approach behaviors in the search for possible grati¢cations (rewards) and positive outcomes in the pursuit of goals- seems to be more characteristic of extraverts- associated with dominance/sensation seeking and impulsivity- Brain symmetry is su F ciently stable over time to suggest an enduring disposition that relates to how one deals with di f erent kinds of emotion-inducing events and experiences.- Individuals who are dominantly left-side active in their brains experience pleasant, positive emotions more easily when positive stimuli are encountered; people who are dominantly right-side active are more ready to respond with negative emotional reactions and distress when they face unpleasant or threatening events....
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This note was uploaded on 11/19/2010 for the course PSYCH V89.-0030- taught by Professor Susan during the Fall '09 term at NYU.

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Extras - Extras chapter 6(pgs 124-138 Eysenck’s theory extraverts di f er from introverts because of di f erences in their physiological level of

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