What is a discriminative stimulus

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A discriminative stimulus is a cue or signal that indicates the probable consequences of a particular operant response. It signals whether a certain response will lead to reinforcement, punishment, or no consequence at all. It is different from an unconditioned stimulus, which is a stimulus that naturally elicits a response without prior learning. It is also different from a reinforcer, which is a consequence that increases the likelihood of a behavior being repeated.

What Is a Discriminative Stimulus