The influence of the researcher's expectations on the outcome of the study refers to
a. reactivity
b. expectancy effects.
c. ecological validity.
d. both reactivity and expectancy effects.
b
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If the null hypothesis is true and we run the Mann-Whitney test on our data, the expectation is that
a. the difference scores will all be zero. b. the test will be significant. c. the sum of the ranks in the two groups will be approximately equal (assuming equal sample sizes). d. the number of subjects in each group will be about the same.
Presenting research so that is can be observed, replicated, criticized, and tested is known as _____
a. systematic empiricism b. the principle of falsifiability c. pseudoscience d. public verification
According to behavioral geneticists, siblings are actually quite different from each other. Which of the following has been used to explain this difference?
A. Because they are different ages, siblings are always at different developmental stages. B. Siblings tend to have very little in common aside from their genes. C. Siblings may experience their family environment very differently. D. Siblings go through the pubertal transition at different times.
Some researchers believe schizophrenia results from brain receptors becoming super responsive to normal amounts of
a. schizotoxin. b. psychotropin. c. dopamine. d. acetylcholine.