Every time Erwin cried, his father would immediately pick him up and he would stop crying.Now almost as soon as Erwin's dad gets home from work, he picks Erwin up.Based on what is known about operant conditioning, you should conclude that for Erwin's father, when the crying stopped it acted as:
A)a positive reinforcer for picking Erwin up
B)a conditioned stimulus for picking Erwin up
C)a negative reinforcer for picking Erwin up
D)an unconditioned stimulus for picking Erwin up

Question

Quizplus · Accepted Answer

Erwin's crying stopping acts as a negative reinforcer for his father's behavior of picking him up because it removes the aversive stimulus (crying), thereby increasing the likelihood that the father will pick him up in the future to avoid the crying.

Every Time Erwin Cried, His Father Would Immediately Pick Him