If a placebo is used, researchers assume that differences in group performance are not due to:
a. experimenter expectancies about the experiment
b. differences in the personal characteristics of subjects in each group
c. subject expectancies about the experiment
d. the environmental conditions that are intentionally manipulated in the experiment
C
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The cross-generational problem is conceptually similar to which other research principle?
a. Cohort effect b. Informed consent c. Benefits-to-risk ratio d. Ecological validity
When a psychologist mentions the term scientific theory, he or she is referring to something that
A) explains a single event. B) explains a wide range of observations. C) is no better an explanation than another person's opinion. D) refers to an educated guess.
By the end of the school years, most children view gender-typed behavior
A) as inborn and fixed. B) as socially influenced. C) as unaffected by home rearing environments. D) in mostly the same manner as they did at age 5.
Depression has been linked to which one of the following neurotransmitters?
A. Glutamate B. Dopamine C. GABA D. Serotonin