Recall the chapter on research methods in your text. Natural improvement, nonspecific treatment effects, and placebo effects are best seen as threats to the _______ of outcome research.
A)statistical significance validity
B)external validity
C)construct validity
D)internal validity

Question

Quizplus · Accepted Answer

These factors are threats to internal validity because they can influence the outcomes of the research in ways that are not related to the treatment being studied, making it difficult to determine if the observed effects are due to the treatment itself.

Recall the Chapter on Research Methods in Your Text