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Definitions (647)

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Measures of variability


 A statistic, such as a range or standard deviation, that indicates how tightly the scores in a set of observations cluster together.
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Homeostasis


 Constancy or equilibrium of the internal conditions of the body.
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Zygote


 The single cell that results when a sperm fertilizes an egg.
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Reinforcement contingency


 A consistent relationship between a response and the changes in the environment that it produces.
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Prejudice


 A learned attitude toward a target object, involving negative affect (dislike or fear), negative beliefs (stereotypes) that justify the attitude, and a behavioral intention to avoid, control, domina [..]
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Human-potential movement


 The therapy movement that encompasses all those practices and methods that release the potential of the average human being for greater levels of performance and greater richness of experience.
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Horizontal cells


 The cells that integrate information across the retina; rather than sending signals toward the brain, horizontal cells connect receptors to each other.
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Debriefing


 A procedure conducted at the end of an experiment in which the researcher provides the participant with as much information about the study as possible and makes sure that no participant leaves feel [..]
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Join APA


Renew Membership
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Yerkes-Dodson law


 A correlation between task performance and optimal level of arousal.
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