A range of disorders involving varying degrees of impairment in communication skills, social interaction, and restricted, repetitive, and stereotyped patterns of behavior is known as ______
a. attention deficit disorder
b. autism spectrum disorder
c. echolalia
d. conduct disorder
B
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If behavior problem scores are normally distributed, and we want to say something meaningful about what values are likely and what are unlikely, we would have to know
a. the mean. b. the standard deviation. c. the sample size. d. both a and b
Sherif studied the impact of social norms on perception using the autokinetic phenomenon and found that
a. a person's judgments of light movements were influenced BY reports of other participants. b. the light seemed to fade away after several minutes of viewing time. c. participants' reports were unaffected by social norms. d. although social norms produce changes in behavior in normal settings, the principle does not extend to perception.
The rapid presentation of a progression of stationary images is a visual illusion termed
a. real movement. c. stroboscopic motion. b. autokinetic effect. d. phi phenomenon.
Why do researchers use random assignment to place participants into one of two or more groups?
a. To eliminate the effect of the independent variable on the dependent variable. b. To randomly distribute the presence of potentially influential differences between groups and increase the chance of drawing a causal inference. c. To make sure that groups in a study are as different as possible at the beginning of the study. d. To correlate the independent and dependent variables.