Bob constantly talks out in class and disrupts

the other students. The teacher has indicated

to Bob that he needs to "not talk out" for at least

10 minutes. If he can work quietly and not talk

out, he will receive 2 minutes of extra free time.

The teacher points out that in an hour, Bob

could earn 12 minutes of free time. During the

10 minutes while he is quiet, the teacher makes

several positive comments about his following

the rules, working quietly, and completing his

work. If Bob does talk out, he does not receive

the extra 2 minutes for the 10-minute period

and is ignored by the teacher.

Cathy thinks she knows all the answers and is

constantly raising her hand in class. The instructor wants her to contribute but does not want her to monopolize the class discussion. She sets a limit for Cathy's contributions at five. If Cathy limits her contributions to five

during the period, she gets to be the teacher's

assistant for the next period. If she goes above

five, another student is picked to be the assistant, and the teacher ignores her hand raises.

Tricia is a first grader and is always out of her

seat. She disturbs the rest of the class and

wanders around the room when the teacher is

talking. The teacher decides to ignore her

when she is out of her seat without permission.

However, when she is in her seat and coloring

or completing her work, the teacher smiles and

reinforces her for working hard.

Danny is a boy with autistic behaviors. He self-stimulates

by mouthing his hands. Because of

the mouthing, sores are developing on his

hands, and his doctor is concerned. His instructors

have taught him to hold on to the side

of his wheelchair or to play with a preferred toy

as incompatible behaviors. When he mouths,

his instructors simply take his hand out of his

mouth and do not pay attention to him.

Read all 4 scenarios and select a differential reinforcement procedure (for each scenario) used to address behavior

Explain why you chose the differential model you did

Also, describe what procedure would not make sense to use in each of the scenarios