Every participant in an experiment has an equal chance of receiving one of the treatments. This is called
a. control assignment.
b. random selection. c. a placebo effect.
d. random assignment. e. control selection.
d
Psychology
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The biological concept of homeostasis is the basis for the __________
a) drive-reduction theory of motivation. b) incentive theory of motivation. c) learning theory of motivation. d) arousal theory of motivation.
Psychology
Shamona, a pregnant mother in Flint, Michigan, is concerned about the drinking water, which shows high levels of lead. Shamona should know that high levels of prenatal lead exposure are related to __________
A) facial abnormalities and heart defects B) defects of the genitals and urinary tract C) low birth weight and brain damage D) a variety of childhood cancers
Psychology