Ralph L. Rosnow

Artifact in behavioral research

The Volunteer Subject

The Volunteer Subject.

Definition and interpretation of interaction effects.

When interaction is claimed in a factorial arrangement, the results almost always require more detailed analysis than is typically reported in our primary journals. In reporting...

If you're looking at the cell means, you're not looking at only the interaction (unless all main effects are zero).

This reply to Meyer explains again that cell means, although usually the results of greatest interest, should not be confused with interaction effects. Unless all main effects a...