In research studies that compare different groups of individuals for each of the treatment conditions, ____ is a threat to internal validity
a. time
b. assignment bias
c. novelty
d. sensitivity
b
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How does the prevalence of anxiety disorders among the elderly compare to the prevalence among other age groups?
a. The prevalence rate is lower among the elderly. b. The highest prevalence rates are found among the elderly. c. The prevalence rates are virtually identical across the life span. d. Whether the rates are high or low depends on both age and gender.
The problem with measuring dispersion by merely averaging all the deviations between each score and the overall mean is that
a. positive and negative deviations will balance out. b. squared values make intuitive interpretation difficult. c. dividing by (N-1) gives a biased statistic. d. There are no problems with measuring dispersion this way.
Experimental research involves
(a) comparison (b) control (c) manipulation (d) all of the above (e) none of the above
A person ______ is MOST likely to be altruistic
a. in a good mood b. in a bad mood c. who fears attention d. who fears ridicule