Chapter 10 - Motivation

Chapter 10 - Motivation - 1 Motivation Hunger Love/Sex...

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Unformatted text preview: 1 Motivation Hunger Love/Sex Achievement 3 Instinct • A complex behavior that is rigidly patterned throughout a species and is unlearned. • Examples: – Imprinting in birds – The return of the salmon to their birthplace – Innate tendencies in humans such as rooting and sucking 4 (1) Drive Reduction Theory • A physiological need creates an aroused tension state (a drive) that motivates an organism to satisfy the need. Physiological Need Psychological Need 5 • Inner Pushes We are pushed by our need to eat (hunger) to reduce the tension by eating. The physiological aim of drive reduction is homeostasis • External Pulls We are pulled by incentives – positive or negative stimuli that lure or repel us. Examples: The sight of an attractive person The threat of disapproval 6 (2) Arousal • Some motivated behavior increases arousal. • Well-fed animals will leave their shelter to explore, seemingly in the absence of any need-based drive. • Curiosity drives explorers and scientists to discover. 7 Abraham Maslow Hierarchy of Needs Hierarchy of Needs 8 9 Hunger The Physiology of Hunger 1- Body Chemistry (insulin and glucose) 2- The Brain (hypothalamus) 3- Set Point 4- Basal Metabolic Rate 10 The Endocrine System 11 The Endocrine System The Hypothalamus It is involved with drives associated with survival such as hunger, thirst, emotion, sex, and reproduction 12 The Brain The Hypothalamus The Lateral Hypothalamus (brings on hunger) When deprived of food and blood sugar is low, the LH churns out orexin, a hunger- triggering hormone. The Ventromedial Hypothalamus (depresses hunger) Stimulate this area and an animal will stop eating. Destroy it & the animal’s intestines will process food very rapidly causing it to eat more often. 13 How Does these Complementary Areas in the Hypothalamus Work? 1- They influence how much glucose is converted to fat and how much is left available to fuel immediate activity (and minimize hunger). 2- Distributed brain systems monitor the body’s state and reports to the hypothalamus, which sends the information to the frontal lobes, which decide behavior. 14 How Does these Complementary Areas in the Hypothalamus Work? 3- Manipulating the lateral and ventromedial hypothalamus alters the body’s “weight thermostat”, which predisposes us to keep our body at a particular weight level called “set point.” 15 Maintaining the Body’s Set-Point Weight 1- The body adjusts to food intake....
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This note was uploaded on 01/13/2012 for the course PSYCH 101 taught by Professor Evettesamaan during the Spring '12 term at Harvard.

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Chapter 10 - Motivation - 1 Motivation Hunger Love/Sex...

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