Browse the glossary using this index
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EXTRANEOUS SOURCES OF REINFORCEMENT:
All nonprogrammed sources of reinforcement in a situation that affect behavior on a specified alternative. See also quantitative law of effect.
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EXTRANEOUS VARIABLES:
Environmental events that are not of interpretive interest to the researcher and that may influence the subject's behavior in ways that obscure the effects of the independent variable.
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EXTRANEOUS VARIABLES:
See Confounding variables. 14 Extrinsic aversive stimuli. Aversive stimuli delivered by an external agent. 27
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EXTRINSIC REINFORCER:
A reinforcer that has an arbitrary relation to the responses that produce it (as when a musician plays for money rather than because the playing produces music). The term has also been applied to stimuli presumed to function as reinforcers because their function has been instructed (as when children are told that it is important to earn good grades); despite their label, such stimuli are often ineffective as reinforcers. Cf. INTRINSIC REINFORCER, CONDITIONED REINFORCER.
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EXTRINSIC VARIABILITY:
The assumption that variability in behavior is describable, predictable, and explainable with reference to variation in other phenomena, either organismic or environmental. See Intrinsic variability.
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