ABSTRACT
Introduction
Memory for the position of a moving target is displaced forward from the actual position of the target; this pattern has been called representational momentum (for review, see Hubbard, 1995). Memory for the boundaries of a picture is displaced outward from the actual location of the boundaries; this pattern has been called boundary extension (see Intraub, Bender, & Mangels, 1992). Both representational momentum and boundary extension involve displacement of memory in the direction beyond the actual stimulus, and both types of displacement have been hypothesized to result from dynamic aspects of memory. Given these similarities, it is possible that representational momentum and boundary extension may reflect the operation of a more general displacement mechanism.
