According to the text, if you were a volunteer working with an AIDS population in Africa today, you would need to raise about how many dollars to pay for one patient's antiretroviral therapy for a year?

We flash a picture of a tree to the right brain of a split-brain patient and a picture of a dog to his left brain. If we ask the split-brain patient to draw what he saw using his left hand (out of sight), he will

a. draw a dog. b. draw a tree. c. draw both a dog and a tree. d. be unable to draw either picture.

According to behavior modification, if a habit is not reinforced it will become

a. extinguished. c. stronger. b. repetitive. d. none of these.