Validity is threatened in a between-subjects design when participants in one group have an opportunity to talk with participants in the other.

Question

Quizplus · Accepted Answer

If participants from different groups have a chance to talk, they may share information about the study or influence each other's responses, which could threaten the validity of the results. Therefore, efforts should be made to limit communication between groups in a between-subjects design.

Validity Is Threatened in a Between-Subjects Design When Participants in One