Salvatore has extreme perfectionism that often prevents him from completing tasks. He begins his rigid schedule at 6 a.m. and does not deviate from it, even when it would be helpful. Salvatore would most likely be diagnosed with which personality disorder?

When determining the effects of age on coronary heart disease, a researcher would record the health of three different age groups—group 1's heart, group 2's heart, and group 3's heart. What would be the dependent variable(s) in this example?

a. Coronary heart disease is the dependent variable; it is the effect based on age b. Age is the dependent variable c. Groups 1-3 are the dependent variable d. The researcher is the dependent variable

Because of gender segregation, we would expect that

A) boys will try to dominate girls. B) boys and girls will play together often. C) boys will mainly just play with other boys. D) "boys will be boys."