In masking studies, sensitivity is usually measured in terms of ______.

What evidence suggests that the development of schizophrenic disorders is not entirely explained by genetics?

a. None of the twin studies have found a concordance rate that even approaches 100 percent. b. DZ twins are not 100 percent concordant. c. Concordance rates for MZ twins are less than for DZ twins. d. Concordance rates for DZ twins are less than for MZ twins.

. John and Kim are in the same grade at school. They have met each other once at camp, but really don't know each other that well. Which of the following is the most accurate description of their relationship? John and Kim are

a. friends. b. peers. c. clique-mates. d. dweebs.