Multiple Choice
Random assignment of subjects to experimental conditions eliminates the possibility of _________ and __________ as threats to internal validity.
A) maturation; history
B) testing; selection
C) history; statistical regression
D) selection; statistical regression
E) testing; instrumentation
Correct Answer:
Verified
Correct Answer:
Verified
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Q63: Testing is likely to threaten internal validity
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Q69: _ is due to random measurement error
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