A diagnosis of AIDS refers to
a. anyone who is infected with HIV
b. anyone who has symptomatic HIV infection
c. anyone in whom HIV infection has become life-threatening
d. all of the above
c
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Which term do researchers usually reserve for anatomical, biological, or genetic differences between females and males?
A. physiology B. gender C. sex D. gender roles
Environmental toxins appear to play ____ role in determining longevity
a. no b. a minimal c. some d. a major
Withdrawal from cocaine typically involves
a) fever, nausea, and vomiting. b) heavy sweating, headache, and indigestion. c) hallucinations, insomnia, and loss of appetite. d) dysphoric mood, fatigue, and sleep abnormalities.
According to the text, ________.
A. confounding variables can easily be eliminated in most types of research B. it is often impossible to eliminate all sources of confounding in a study C. confounding variables are a greater problem in experimental research than in correlational research D. confounding variables are of little concern because they do not pose a great threat to internal validity