Participants in a research project who are placed under some emotional or physical risk are

Lester has high test anxiety, which tends to affect his test performance even though he studies a lot. According to the inverted U function, which of the following activities will help Lester improve his performance?

a. Study harder. b. Use relaxation exercises before each test. c. Study less since his performance won't be that good anyway. d. Get a tutor. e. Review his notes every third day, so that he doesn't get "repetition overload."

Individuals whose __________ systems function more efficiently appear to have an edge in intellectual skills

A) endocrine B) nervous C) circulatory D) cardiovascular