a need or desire that energizes and directs behavior
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Instinct
a complex behavior that is rigidly patterned throughout a species and is unlearned
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Drive-reduction theory
the idea that a physiological need creates an aroused tension state (a drive) that motivates an organism to satisfy the need
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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
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Incentive
a positive or negative environmental stimulus that motivates behavior
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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
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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.
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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.
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Basal metabolic rate
the body's resting rate of energy expenditure
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Anorexia nervosa
an eating disorder in which an irrational fear of weight gain leads people to starve themselves
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Bulimia nervosa
an eating disorder characterized by episodes of overeating, usually of high-calorie foods, followed by vomiting, laxative use, fasting, or excessive exercise
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Sexual response cycle
the four stages of sexual responding described by Masters and Johnson - excitement, plateau, orgasm, and resolution
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Refractory period
a resting period after orgasm, during which a man cannot achieve another orgasm
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Sexual disorder
a problem that consistently impairs sexual arousal or functioning
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Estrogen
A sex hormone, secreted in greater amounts by females than by males. In nonhuman female mammals, estrogen levels peak during ovulation, promoting sexual receptivity.
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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
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Sexual orientation
an enduring sexual attraction toward members of either one's own sex (homosexual orientation) or the other sex (heterosexual orientation)
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Flow
a completely involved, focused state of consciousness, with diminished awareness of self and time, resulting from optimal engagement of one's skills
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Industrial-organizational (I/O) psychology
the application of psychological concepts and methods to optimizing human behavior in workplaces
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Personnal psychology
a sud-field of I/O psychology that focuses on employee recruitment, selection, placement, training, appraisal, and developement.
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Organizational psychology
a subfield of I/O psychology that examines organizational influences on worker satisfaction and productivity and facilitates organizational change
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Structured interviews
interview process that asks the same job-relevant questions of all applicants, each of whom is rated on established scales
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Achievement motivation
a desire for significant accomplishment: for mastery of things, people, or ideas; for attaining a high standard
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Task leadership
goal-oriented leadership that sets standards, organizes work, and focuses attention on goals
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Social leadership
group-oriented leadership that builds teamwork, mediates conflict, and offers support
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Emotion
a response of the whole organism, involving (1) physiological arousal, (2) expressive behaviors, and (3) conscious experience
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James-Lange theory
the theory that our experience of emotion is our awareness of our physiological responses to emotion-arousing stimuli
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Cannon-Bard theory
the theory that an emotion-arousing stimulus simultaneously triggers (1) physiological responses and (2) the subjective experience of emotion
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Two-factor theory
Schachter-Singer's theory that to experience emotion one must (1) be physically aroused and (2) cognitively label the arousal.
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Polygraph
a machine, commonly used in attempts to detect lies, that measures several of the physiological responses accompanying emotion (such as perspiration and cardiovascular and breathing changes).
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Catharsis
emotional release. In psychology, the catharsis hypothesis maintains that "releasing" aggressive energy (through action or fantasy) relieves aggressive urges.
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Feel-good, do-good phenomenon
people's tendency to be helpful when already in a good mood
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Subjective well-being
self-perceived happiness or satisfaction with life. Used along with measures of objective well-being (for example, physical and economic indicators) to evaluate people's quality of life.
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Adaptation-level phenomenon
our tendency to form judgments (of sounds, of lights, of income) relative to a neutral level defined by our prior experience
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Relative deprivation
the perception that one is worse off relative to those with whom one compares oneself