Professor Gomez conducts a meta-analysis of the estimated number of diagnoses of HIV infection in the United States. She finds that certain groups continue to be disproportionately affected by the virus. Which group of individuals is she most likely to find most affected?
A) female, biracial, female having sex with female, injection drug users
B) male, Hispanic/Latino, heterosexual, married men
C) male, African American, men having sex with men
D) female, Native American, heterosexual, sex workers
Ans: C) male, African American, men having sex with men
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In an experiment on the effects of level of motivation on the performance of typists, the researcher randomly assigned one third of her subjects to each of three levels of motivation (and then induced different levels of motivation in the three groups)
She measured the average words typed per minute by each group, and found that performance was highest under medium motivation, average under low motivation, and worst under high motivation. What was the independent variable in this experiment? a. motivation b. typing speed c. variation in typing speed d. manipulation of typing speed
The difference between anorexia nervosa and bulimia nervosa is:
a. Anorexia nervosa includes excessive exercising, binge/purge cycles, and caloric restriction while bulimia nervosa is limited to binge/purge cycles. b. Anorexia nervosa includes excessive exercising and caloric restriction while bulimia nervosa is limited to binge/purge cycles. c. Anorexia nervosa includes excessive caloric restriction while bulimia nervosa is limited to binge/purge cycles. d. None of the above