What do observational and correlational research have in common?
a. They cannot answer causal questions.
b. They can describe social behavior.
c. They cannot predict behavior.
d. They can use random assignment.
Answer: A
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The most consistent empirical evidence for long-lasting neurotoxicity to serotonergic neurons that is associated with exposure to several moderately high doses in humans has been found with
a. LSD ("acid") b. MDMA ("Ecstasy") c. anticholinergics d. phencyclidine (PCP, "angel dust")
In Canada and Western Europe, where community- and school-based clinics offer adolescents contraceptives and where universal health insurance helps pay for them, __________ than in the United States
A) teenage sexual activity is much higher B) teenage sexual activity is much lower C) pregnancy, childbirth, and abortion rates are much higher D) pregnancy, childbirth, and abortion rates are much lower