Candace compares the reaction times of people diagnosed with obsessive-compulsive disorder and people not diagnosed with obsessive-compulsive disorder. Candace has conducted a(n)
A) within-subjects study.
B) matched pairs study.
C) true experiment.
D) ex post facto research study.

Question

Quizplus · Accepted Answer

Candace's study is ex post facto because it involves comparing existing groups (those with and without OCD) without manipulating any variables.

Candace Compares the Reaction Times of People Diagnosed with Obsessive-Compulsive