Exhibit 10-10: Identify the major threat to internal validity in the following research studies.
-Refer to Exhibit 10-10.A researcher used two classrooms in an experimental study.It was found that the E group had more high ability students than the C group before the study began.
A) Regression
B) Diffusion
C) Mortality
D) Selection bias
E) History

Question

Quizplus · Accepted Answer

The major threat to internal validity in this study is selection bias, as there was a difference in the pre-existing characteristics (high ability students) between the groups. This could have influenced the results and made it difficult to determine the true effect of the intervention being studied.

Exhibit 10-10: Identify the Major Threat to Internal Validity in the Following