the answer is: discriminative stimulus; response; reinforcer
Three term contingency stated that a behavior that conducted by a certain individual at the current time is most likely a result of the behavior that the individual did in the past.
It propose that this set of behavior is always undergone three steps of discriminative stimulus, response, and reinforcer:
- Discriminative stimulus refers to a certain situation or object that can trigger a certain action or behavior
- Response refers to the action/behavior that made in reaction to the stimulus.
- Reinforce refers to additional reward or punishment that can help to ensure that a certain response would be repeated again in the future.