Ch12 - Motivation Need or desire that energizes behaviour...

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Motivation - Need or desire that energizes behaviour and directs it toward a goal Theories of Motivation Instincts and Evolutionary Psychology Instinct –rigidly patterned complex behaviour unlearned throughout a species - Self-abasement vs self-assertion - Consistent with animal literature Drives and Incentives Need Drive Drive-Reducing Behaviour Drive-Reduction Theory – satisfy physiological need that creates aroused tension (drive) Homeostasis – maintenance of steady internal state Incentive – environmental stimulus that motivates behaviour Optimum Arousal After biological needs satisfied, driven to experience stimulation, but too much becomes stress A Hierarchy of Motives (Maslow) Physiological, Safety, Belongingness and Love, Esteem, Self-Actualization Hunger The Physiology of Hunger Body Chemistry and the Brain: Insulin = low glucose = hunger Lateral hypothalamus hunger-triggering orexin hormone Ventromedial hypothalamus depresses hunger Ghrelin secreted by empty stomach PYY digestive (fullness) hormone suppresses appetite Basal Metabolic Rate – body’s resting rate of energy expenditure
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Set Point – “weight thermostat” - Increase hunger and lower metabolism to restore lost weight Settling Point – response to caloric intake and expenditure - Influenced by env and bio
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This note was uploaded on 12/13/2011 for the course PSYCH 102 102 taught by Professor Hamilton during the Spring '09 term at UBC.

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Ch12 - Motivation Need or desire that energizes behaviour...

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