A bag of 100 hard candies included 30 butterscotch, 40 peppermint, 15 strawberry, 10 orange, and 5 banana. The probability that the first candy pulled out of the bag will be butterscotch or strawberry is .45

Suppose a new drug is developed, which increases the activity of the neurotransmitter gamma-aminobutyric acid (GABA) in the brain. This drug is most likely to

a. be calming and reduce anxiety. b. reduce psychotic episodes. c. reduce feelings of sadness and improve mood. d. reduce manic behaviors.

What lesson can be learned from the U.S. Army's M-1 Abrams tank?

a) Psychologists will refuse to work on weapons. b) Psychological tests should not be used in selecting soldiers. c) Human factors research has a lot to offer in the design of equipment. d) Slow moving equipment requires a different type of feedback than faster moving equipment.