Rhonda designs an experiment in which half of her participants are randomly assigned to view a sad movie and half view a comedy, but all participants fill out three mood surveys at one, two, and three weeks after the movie. This is an example of
A) a between-participants design.
B) a within-participants design.
C) a non-equivalent posttest-only design.
D) a mixed-model, factorial design.

Question

Quizplus · Accepted Answer

This is a mixed-model, factorial design because it involves both between-participants (different groups viewing different movies) and within-participants (same participants taking multiple mood surveys over time) elements.

Rhonda Designs an Experiment in Which Half of Her Participants