A psychologist is trying to understand the level of cooperation and conflict evident in the social exchanges of a family. This psychologist is focusing on

The hormone _________ is released by the body during the physiological

response to a fear stimulus. (a) estrogen (b) progesterone (c) adrenaline (d) testosterone

Which set of people is likely to have the highest correlation in IQ scores?

a. parent and child b. siblings c. dizygotic twins raised together d. monozygotic twins raised apart