Venus effect

The Venus effect is a phenomenon in the psychology of perception, named after Diego Velázquez's painting The Rokeby Venus. Viewers of the painting assume that Venus is admiring her own reflection in the mirror. However, since the viewer sees her face in the mirror, Venus would actually be looking at the viewer, not at herself.

This psychological "trick" is often used in the cinema, where an actor will be shown apparently looking at himself in the mirror, with the camera just out of shot. In fact, the actor will be looking at the camera and just be pretending to see himself in the mirror.