Final answer:
The stimulus is the most responsible for exerting stimulus control over a particular behavior in the 3-contingency model.
Step-by-step explanation:
Psychology
The part of the 3-contingency that is most responsible for exerting stimulus control over a particular behavior is the stimulus. In the 3-contingency model, there are three components: antecedents (stimuli that precede the behavior), behavior (the target behavior), and consequences (the outcomes that follow the behavior). The stimulus, or trigger, for the behavior plays a crucial role in shaping and controlling the behavior.
For example, if a teacher wants to reinforce a student for raising their hand in class, the teacher may use a verbal cue or a hand signal as the antecedent stimulus to prompt the behavior. The student then raises their hand (the behavior), and the teacher provides praise or a reward (the consequence). In this case, the stimulus (the teacher's cue) exerts control over the student's behavior.