For which of the following designs is multiple-treatment interference a substantial threat?
A) Time series design
B) Counterbalanced design
C) Solomon four group design
D) Posttest-only control group design

Question

Quizplus · Accepted Answer

Counterbalanced designs involve presenting treatments in different sequences to control for order effects, but this can lead to multiple-treatment interference as the effect of one treatment might carry over and affect the response to subsequent treatments.

For Which of the Following Designs Is Multiple-Treatment Interference a Substantial