Research Assistant Z is particularly enthusiastic when working with subjects who are receiving SUPER treatment but less animated when working with subjects who are receiving a placebo.Z's actions may introduce what type of internal invalidity into the research on SUPER treatment?
A)history effect
B)treatment misidentification
C)selection bias
D)John Henry effect

Question

Quizplus · Accepted Answer

Treatment misidentification occurs when the behavior of the researcher or participants inadvertently affects the outcome of the study. In this case, Research Assistant Z's varying enthusiasm based on the treatment type could influence the subjects' responses or outcomes, leading to invalid conclusions about the effectiveness of the SUPER treatment.

Research Assistant Z Is Particularly Enthusiastic When Working with Subjects