Every time the instructor says, "to summarize today’s lesson…" her students start packing up their notebooks. the students have learned this phrase as a discriminating stimulus.
A discriminative stimulus is the antecedent stimulus that has stimulus control over behavior because the behavior was reliably reinforced in the presence of that stimulus in the past. Stimuli and comeback are Rational by different terminology. The three stages of classical conditioning are before acquisition, acquisition, and after acquisition. Classical conditioning involves associating an involuntary response and a stimulus, while operant conditioning is about associating a voluntary behavior and a consequence.
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