When two autistic boys were ignored after instances of self-destructive behavior, their tendency to injure themselves disappeared. The operant principle employed was

A friend has been told by his girlfriend that his hormones are out of balance, so he decides to do a little research. He is compiling a list of all of the characteristics of hormones

Which of the following statements should you tell him to remove from his list? Hormones a. help fight infections and disease. b. serve as the basis for mood changes. c. have general, rather than specific or targeted effects. d. initiate, maintain, and stop development of primary and secondary sexual characteristics.

Which of the following is true of people with depersonalization?

a. They do not know who they are. b. They maintain contact with reality, even during a depersonalization episode. c. The feelings of depersonalization tend to come on gradually and fade suddenly. d. Their memories are rarely intact and they do not seem to know where they are.