[Boundary extension as the effects of scene context on picture-memory].

Boundary extension is a picture-memory phenomenon that viewers remember seeing wider-angle view than was actually depicted in a photography. To explain boundary extension, Intraub, Bender and Mangels (1992) proposed the scene context hypothesis that boundary extension is due to viewer's expectancy of scene continuity outside the camera's field of view. The present study tested this hypothesis. Experiment 1 replicated the phenomenon of boundary extension. In Experiment 2, a retention interval did not have much effects on this distortion. Experiment 3 revealed that the occurrence of boundary extension was affected by activation of scenic representation that would have existed outside the picture frame. These results supported the scene context hypothesis.