discriminative stimulus
Also written as: SD
An environmental cue that signals when a particular behavior is likely to be reinforced, serving as an occasion for that behavior to occur.
Full Definition
A discriminative stimulus is an antecedent event that indicates the availability of reinforcement for a specific behavior in a given context. The presence of the discriminative stimulus increases the probability that the behavior will occur because of the individual's learning history associating that stimulus with reinforcement. Common examples include traffic lights for driving behavior, teacher instructions for classroom responses, and social cues for appropriate conversation topics. Effective behavioral interventions often focus on strengthening appropriate stimulus control by clearly establishing discriminative stimuli for desired behaviors.
Usage
Usage note: Often abbreviated as SD; distinct from conditioned stimuli in classical conditioning paradigms.
In Context
- "The green card served as a discriminative stimulus indicating when requests for breaks would be honored." — Behavior support plan
- "Poor stimulus control was evident when the client failed to respond differently to various discriminative stimuli." — Assessment summary