One should not infer a direct cause-and-effect relationship when the research method is
A) experimental
B) post-facto
C) double-blind
D) repeated-measures

Question

Quizplus · Accepted Answer

Post-facto research design only observes and collects data after an event has occurred, so it cannot establish a direct cause-and-effect relationship. The other options (experimental, double-blind, and repeated-measures) can potentially establish cause-and-effect relationships.

One Should Not Infer a Direct Cause-And-Effect Relationship When the Research