What does randomly assigning subjects to different groups ultimately do?
A. it makes the selection of subjects less time consuming
B. it prevents subjects from knowing what group they are in
C. it controls any factors that might influence the results of the study
D. it ensures that there is an equal number of males and females in each group
Answer: C
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Why do psychologists infer that many 2-year-old children have a "sense of self"?
a. When they see a spot on their face in the mirror, they touch their face. b. They speak more slowly when talking to other children than to adults. c. They pay more attention to an "informed" adult than an uninformed one. d. When they see an "impossible" event, they stare in apparent surprise.
Reynolds was unable to market Premier, a plastic cigarette containing catalytic crystals coated with tobacco extract, because
A. they were too expensive. B. the FDA considered them a "nicotine delivery device" rather than an agricultural product. C. they proved more toxic than regular cigarettes. D. they had a foul taste.
In which part(s) of the brain are the sensory, motor, and intellectual functions linked together?
A) Association areas B) Parietal lobes of the cerebral cortex C) Cerebellum D) Corpus callosum
A person who engages in echolalia repeats what others say
Indicate whether the statement is true or false