Anticipatory spatial representation of natural scenes: Momentum without movement?

Abstract

Does mental representation of the immediate past contain anticipatory projections of the future? In cases of representational momentum (RM), the last remembered location of a moving object is displaced farther along its path of motion. In boundary extension (BE), the remembered view of a scene expands to include a region just outside the boundaries of the original view. Both are "errors", yet they make remarkably good predictions about the real world. The factors affecting these phenomena, the boundary conditions for their occurrence, and their generality to non-visual senses (audition or haptics) are reviewed to determine if RM and BE are fundamentally related. In contrast to Hubbard's (1995b) suggestion that they may share a common underlying mechanism, it is proposed instead that RM and BE are related in a more general sense and may be different instantiations of the dynamic nature of mental representation.