Several four-year-old boys are sitting at a table playing with cars in a makeshift race, and one boy stands by the table watching them. Occasionally, the boy who is standing calls out for the green car to go faster. This is an example of __________ play

During a mildly stressful task, reactive children are more likely than nonreactive to show ________

a. high levels of stress hormone. b. decreased brain activity. c. no physiological change. d. decreased heart rates.

What are endophenotypes?

A. Abnormally shaped cells in the brain B. Neurotransmitters of slightly different chemical composition than normal C. Discrete, stable, and measurable traits thought to be under genetic control D. Specific chromosomes thought to be important in the genetic transmission of schizophrenia