Why doesn't Aunt Polly believe Tom when he tells her that he has finished painting the fence? He has a habit of lying to her.
She knows he didn't have enough paint.
She has been watching him from the window.
He doesn't know how to paint.

According to behaviorism, instruction should provide necessary stimulus in order for learners to produce desired response. it is important that the learner must know how to execute the proper response under the required conditions in order to produce the desired response (ertmer & newby, 1993). instruction should provide learner with opportunities that the learner practice to elicit the desired outcome.