The placebo effect occurs when:
A. changes occur simply because participants expect them to.
B. changes do not occur because participants do not believe in the experiment.
C. the experimenter is blind to study conditions.
D. the participant is blind to study conditions.
Answer: A
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A researcher who asks questions related to conformity and prejudice likely studies which aspect of social psychology?
A. social thinking B. social influence C. social behavior D. social norms
Luigi Galvani identified a region of the brain that he thought was necessary for hearing.
Answer the following statement true (T) or false (F)
Researchers examining the impact of aspirin on preventing heart attacks found a very weak effect size but concluded that aspirin was indeed helping to prevent heart attacks and prevent individuals from dying from a heart attack. How is this possible?
A. The results were not statistically significant. B. The confidence interval was very wide. C. The effect size was weak but consistent. D. The impact of aspirin had practical significance.
Why shouldn't the mode be used with the following set of scores? 2, 5, 3, 3, 4, 2, 4, 5, 1, 1
a. The data are obviously not nominal. c. The scores are positively skewed. b. There is no mode; all scores occur with the same frequency. d. The scores are negatively skewed.