An experimenter tests the hypothesis that physical exercise improves mood. Subjects in the experimental group participate on Monday and Tuesday and those in the control group on Wednesday and Thursday. What is the extraneous variable?

One factor that may contribute to declining male academic performance may be

A) a decline in the number of male teachers in high schools. B) curriculum reforms that have cut back on physical education and sports. C) increased feminization of schools. D) declining morals among males.

Kim is an Asian immigrant living in San Francisco. She is most likely to experience

emotional problems if ______. a. her parents are rich b. her parents push her to hard academically c. she is alienated from both of her cultures d. she is an only child