By adding a control group in an interrupted time-series design, researchers hope to
a. increase nonsystematic variability.
b. increase the internal validity of the study.
c. decrease the clarity of the effects of the independent variable.
d. decrease the reliability of dependent variable.
b
Psychology
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When adults participate, toddlers' make-believe
A) tends to focus on repetitive actions. B) is less elaborate. C) is more elaborate. D) tends to focus on following rules.
Psychology
Many Native Americans believe _______________is largely responsible for their high rates of drinking-related problems
a. discrimination and prejudice from more dominant racial groups b. loss of their traditional culture c. lack of access to stimulating activities on reservations d. poverty and lack of access to good health care
Psychology