Browse the glossary using this index
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UNCONDITIONED AVERSIVE STIMULUS:
A stimulus, object, or event, such as a painful electric shock, a bee sting, or a sudden loud noise, that functions aversively in the absence of any prior learning history (i.e., its contingent occurrence is punishing). 27
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UNCONDITIONED OR UNCONDITIONAL RESPONSE:
See UNCONDITIONED REFLEX.
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UNCONDITIONED REFLEX OR UNCONDITIONAL REFLEX:
A relation between a stimulus and a response that does not depend on prior conditioning. A reflex is the reliable production of a response by a stimulus. The stimulus is an unconditioned stimulus (US), and the response is an unconditioned response (UR). The stimulus is said to elicit the response. Examples of unconditioned reflexes are the salivary reflex (salivation elicited by food or acid in the mouth) and the patellar reflex (a knee jerk elicited by a blow on the patellar tendon). In each case, the elicitation of the response by the stimulus, not the response alone or the stimulus alone, defines the reflex. Cf. RESPONDENT.
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UNCONDITIONED REINFORCER:
A stimulus, such as food, water, or sexual activity, that usually is reinforcing in the absence of any prior learning history; often used interchangeably with primary reinforcer. 9 Validity. The extent to which measures actually measure what they are purported to measure. 5
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UNCONDITIONED RESPONDENT BEHAVIOR:
An autonomic response that requires no previous learning. Other respondent behavior may be conditioned, as in Pavlov's famous experiments with the conditioning of dogs' salivation responses. See also Elicit. 16
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UNCONDITIONED RESPONSE: All organisms are born with a set of reflexes (US - UR). These
relationships are invariant and biologically based. The behavior
elicited by the US is called the unconditioned
response (UR). |
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UNCONDITIONED RESPONSE: An unconditioned response (reflex
behavior) is the behavior elicited by an unconditioned stimulus.
Such behavior frequently influences the internal economy of the
organism. The form is usually determined by the organism's
phylogenetic history. |
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UNCONDITIONED RESPONSE:
An unlearned response elicited by the presentation of an unconditioned stimulus.
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UNCONDITIONED RESPONSES:
Responses in which the class of eliciting stimuli has this function without a history of being paired with unconditioned stimuli.
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UNCONDITIONED STIMULUS: All organisms are born with a set of reflexes (US - UR). These
relationships are invariant and biologically based. The eliciting
event is called the unconditioned
stimulus (US). |
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