A factorial study compares the effectiveness of two allergy medications by measuring symptoms immediately before taking the medication, 30 minutes after the medication, and 3 hours after the medication. Half of the participants take one of the medications and the rest take the second medication. Which statement accurately describes this study?
A) It is a between-subjects design that uses both the experimental and nonexperimental strategies.
B) It is a between-subjects experiment.
C) It is a nonexperimental between-subjects design.
D) It combines between- and within-subjects designs and uses both the experimental and nonexperimental strategies.

Question

Quizplus · Accepted Answer

The study involves both between-subjects (different groups taking different medications) and within-subjects (measuring symptoms at multiple time points for the same participants) designs. It also uses experimental strategies (testing the effect of medications) and nonexperimental strategies (observing symptom changes over time).

A Factorial Study Compares the Effectiveness of Two Allergy Medications