Discriminative Stimulus
SD
In Plain Language
A cue that, through past learning, signals a response is likely to produce reinforcement.
ABA Definition
An antecedent stimulus correlated with the availability of reinforcement for a particular response relative to its absence or another stimulus.
Everyday Example
An open sign signals that entering a shop can lead to service.
ABA Example
An available communication partner may signal that a request can produce help.
How It May Be Used
A cue signals availability; it does not force a response or necessarily change the value of the outcome.