True experimental designs control for maturation and history.
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Q48: Attrition effects pertain only to studies using
Q49: Random assignment controls for the effects of
Q50: History is basically a problem of external
Q51: Maturation effects may occur when experimental conditions
Q52: Statistical regression may be a threat to
Q54: A pretest is an essential feature of
Q55: A posttest-only control group design eliminates the
Q56: A weakness of the pretest-posttest control group
Q57: In a within-subjects design, each subject participates
Q58: Counterbalancing controls for selection effects in between-subject
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