The authors of your textbook discussed a study on teaching practices in which their two classes where communicating with one another and influenced the results of the study.In this scenario, which of the following was a threat to internal validity?
A)attrition
B)testing
C)diffusion of treatment
D)instrumentation

Question

Quizplus · Accepted Answer

The diffusion of treatment is a threat to internal validity in this scenario because the two classes were communicating with one another and potentially sharing information about the teaching practices being studied. This means that the treatments may have diffused between groups and influenced the results, making it difficult to determine the true effects of the teaching practices being studied. Attrition refers to participants dropping out of a study, testing refers to participants being affected by taking the same test multiple times, and instrumentation refers to changes in the measurement tool used in a study. While these factors may also be threats to internal validity in other scenarios, they are not relevant to the study described in this question.

The Authors of Your Textbook Discussed a Study on Teaching