In a nonequivalent group design, the nonequivalence of the groups is sometimes demonstrated by a pretest. If a researcher is worried that the units of measurement on the scale are not equal throughout the scale, the researcher is worried about which threat to internal validity?
A) Maturation
B) History
C) Statistical regression
D) Instrumentation

Question

Quizplus · Accepted Answer

The concern about unequal units of measurement throughout the scale relates to the threat of instrumentation, which involves changes in measurement tools or procedures that may affect the results.

In a Nonequivalent Group Design, the Nonequivalence of the Groups