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Chapter 7

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University of Toronto Scarborough
Zachariah Campbell

Behavioral Modification: Principles & Procedures Chapter 7 – Stimulus Control: Discrimination and Generalization  Operant behavior is strengthened when it is followed by a reinforcing consequence; it is weakened when the reinforcing consequence no longer follows the behavior (extinction)  Antecedents are stimulus events that precede an operant response – the antecedents of a behavior are the stimuli, events, situations, or circumstances that are present when it occurs or were present immediately before the behavior  Stimulus control occurs when a behavior is more likely to occur when a specific antecedent stimulus was present  The antecedent stimulus that is present when a behavior is reinforced is d known as the discriminative stimulus (S )  The process of reinforcing a behavior only when a specific antecedent stimulus (S ) is present is called stimulus discrimination training  Two steps are involved in stimulus discrimination training: d o When the S is present, the behavior is reinforced o When any other antecedent stimuli except the s are present, the behavior is not reinforced. During discrimination training, any antecedent stimulus that is present when the behavior is not Δ reinforced is called an
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