What best defines a discriminative stimulus?

Question

Quizplus · Accepted Answer

A discriminative stimulus is defined by its effect on behavior. It signals to the organism that a certain behavior will have a particular consequence, and the organism responds accordingly. It does not necessarily always elicit a response, as this depends on the history of conditioning for that specific organism, and it can be established using both operant and respondent procedures. Any change in the environment, including non-discriminative stimuli, would not be considered a discriminative stimulus.

What Best Defines a Discriminative Stimulus