A classmate just returned from an educational trip to a traditional culture. During her visit, she was surprised that fathers are not involved at all during the process of labor. Who is more likely to assist the mother through labor and delivery?

You would most likely be diagnosed with ________ if you displayed negative mood, sleep disturbances, difficulty concentrating, and thoughts of suicide over the last few months.

a. posttraumatic stress disorder b. major depressive disorder c. persistent depressive disorder d. bipolar I disorder

A little boy is allowed to play with a laboratory rat and shows no fear of it. Then, a

scientist makes a scary noise by banging an iron bar whenever the little boy reaches for the rat. Soon, the boy begins crying whenever the rat comes near him. In this study, the boy's fear of the rat is the ______. a. unconditioned stimulus c. conditioned stimulus b. unconditioned response d. conditioned response