Subject selection is a major threat to
A) internal validity
B) external validity
Correct Answer:
Verified
Q138: Experimental designs are defined as the
A) benchmark
Q139: Control groups are the
A) benchmark for comparing
Q140: Experimental units are the
A) benchmark for comparing
Q141: Maturation is a major threat to
A) internal
Q142: Mortality is a major threat to
A) internal
Q144: History is a major threat to
A) internal
Q145: Testing is a major threat to
A) internal
Q146: Instrumentation is a major threat to
A) internal
Q147: Statistical regression is a major threat to
A)
Q148: Field experiments are
A) carried out in a
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