Three-year-old kayla has been seeing her pediatrician for checkups every six months and fears the shots she receives each time. now, even though he does not administer the shots, kayla cries when the pediatrician enters the room because she associates him with receiving shots. the pediatrician has become a(n):

Conditioned stimulus.

Fear conditioning refers to a learning behaviour in which an aversive stimulus is paired with a neutral stimulus, up to the point in which the neutral stimulus elicits the same response as the aversive one, even when not paired together.

Before the experiences, the doctor was a neutral stimulus because his effect did not depend on previous experience. The aversive stimulus was the shots. The pairing of the doctor with the shots repeatedly elicits the conditional response, which is the crying. It also turns the doctor into a conditioned stimulus.

the last day of school because i didn’t have to go to school the next day