Unit 8A: Motivation and Emotion: Motivation

Unit 8A:Motivation and Emotion:

Motivation

Introduction

• Motivation

Motivational Concepts

Instincts and Evolutionary Psychology

• Instinct (fixed pattern)–Instincts in animals

–Instincts in humans

Drives and Incentives

• Drive-reduction theory–Homeostasis

–Need

–Drive

–Drive reduction

Drives and Incentives

• Incentive–Positive and negative

Optimum Arousal

• Arousal–Optimum level of arousal

A Hierarchy of Motives

• Maslow’s hierarchy of needs–Variations in the hierarchy

A Hierarchy of Motives

Hunger

The Physiology of Hunger

• Contractions of the stomach–Washburn study

The Physiology of HungerBody Chemistry and the Brain

• Glucose

• Insulin

• Hypothalamus–Lateral hypothalamus

• orexin

–Vetromedial hypothalamus

The Physiology of HungerBody Chemistry and the Brain

• Appetite hormones–Ghrelin–Obestatin–PYY–Leptin

• Set point• Basal metabolic rate

The Psychology of HungerTaste Preferences: Biology and Culture

• Taste preferences–Genetic: sweet and salty

–Neophobia

–Adaptive taste preferences

The Psychology of HungerEating Disorders

• Eating disorders–Anorexia nervosa

–Bulimia nervosa

–Binge-eating disorder

Level of Analysis for Our Hunger Motivation

Obesity and Weight Control

• Historical explanations for obesity

• Obesity–Definition

–Statistics

–Obesity and life expectancy

Obesity

Obesity and Weight ControlThe Social Effects of Obesity

• Social effects of obesity

• Weight discrimination

• Psychological effects of obesity

Weight Discrimination

Obesity and Weight ControlThe Physiology of Obesity

• Fat Cells


• Set point and metabolism


• The genetic factor

• The food and activity factor–Sleep loss

–Social influence

–Food consumption and activity level

Obesity and Weight ControlLosing Weight

• Realistic and moderate goals

• Success stories

• Attitudinal changes

Sexual Motivation

The Physiology of SexThe Sexual Response Cycle

• Sexual response cycle–Excitement phase–Plateau phase–Orgasm–Resolution phase

• Refractory period

The Physiology of SexHormones and Sexual Behavior

• Effects of hormones–Development of sexual characteristics

–Activate sexual behavior

• Estrogen

• Testosterone

The Psychology of Sex

• External stimuli

• Imagined stimuli–Dreams

–Sexual fantasies

Levels of Analysis for Sexual Motivation

Adolescent SexualityTeen Pregnancy

• Ignorance

• Minimal communication about birth control

• Guilt related to sexual activity

• Alcohol use

• Mass media norms of unprotected promiscuity

Adolescent SexualitySexually Transmitted Infections

• Statistics of STIs

• Teen abstinence–High intelligence

–Religious engagement

–Father presence

–Participation in service learning programs

–xxx

Sexual Orientation

• Sexual orientation–Homosexual orientation

–Heterosexual orientation

• Sexual orientation statistics

Sexual OrientationOrigins of Sexual Orientation

• Origins of sexual orientation studies–Fraternal birth order effect

• Same-sex attraction in animals• The brain and sexual orientation• Genes and sexual orientation• Prenatal hormones and sexual

orientation

The Need to Belong

The Need to Belong

• Aiding survival

• Wanting to belong

• Sustaining relationships

• The pain of ostracism–ostracism

The End

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Definition Slides

Motivation

= a need or desire that energizes and directs behavior.

Instinct

= a complex behavior that is rigidly patterned throughout a species and is unlearned.

Drive-reduction Theory

= the idea that a physiological need creates an aroused tension state (a drive) that motivates an organism to satisfy the need.

Homeostasis

= a tendency to maintain a balanced or constant internal state; the regulation of any aspect of body chemistry, such as blood glucose, around a particular level.

Incentive

= a positive or negative environment stimulus that motivates behavior

Hierarchy of Needs

= Maslow’s pyramid of human needs, beginning at the base with physiological needs that must first be satisfied before higher-level safety needs and then psychological needs become active.

Glucose

= the form of sugar that circulates in the blood and provides the major source of energy for body tissues. When its level is low, we feel hunger.

Set Point

= the point at which an individual’s “weight thermostat” is supposedly set. When the body falls below this weight, an increase in hunger and a lowered metabolic rate may act to restore the lost weight.

Basal Metabolic Rate

= the body’s resting rate of energy expenditure.

Anorexia Nervosa

= an eating disorder in which a person (usually an adolescent female) diets and becomes significantly (15 percent or more) underweight, yet, still feeling fat, continues to starve.

Bulimia Nervosa

= an eating disorder characterized by episodes of overeating, usually high-calorie foods, followed by vomiting, laxative use, fasting, or excessive exercise.

Binge-eating Disorder

= significant binge-eating episodes, followed by distress, disgust, or guilt, but without the compensatory purging, fasting, or excessive exercise that marks bulimia nervosa.

Sexual Response Cycle

= the four stages of sexual responding described by Masters and Johnson – excitement, plateau, orgasm, and resolution.

Refractory Period

= a resting period after orgasm, during which a man cannot achieve another orgasm.

Estrogens

= sex hormones, such as estradiol, secreted in greater amount by females than males and contributing to female sex characteristics. In nonhuman female mammals, estrogen levels peak during ovulation, promoting sexual receptivity.

Testosterone

= the most important of the male sex hormones. Both males and females have it, but the additional testosterone in males stimulates the growth of the male sex organs in the fetus and the development of the male sex characteristics during puberty.

Sexual Orientation

= an enduring sexual attraction toward members of either one’s own sex (homosexual orientation) or the other sex (heterosexual orientation).

Unit 8A: Motivation and Emotion: Motivation

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