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pus d in ppe d The position integration model suggests motion integration is a form of interpolation of past positions, and predicts that we cannot per-ceive the reversal point at its actual position on the trajectory of a moving object which reverses abruptly. In current research, we dem-tion of moving objects. Current work on the flash-lag effect objects, so by the time the flashed object reaches the ‘‘per-ceptual end point’’, the moving object has already moved to a new position (Whitney & Cavanagh, 2000; Whitney is estimated by integrating continuous positional signals The spatial model has aroused much attention in recent years. These two spatial models both assume that the positional perception of moving objects is the result of integrating positional signals over time. This ‘‘position integration’ ’ hypothesis predicts that if a moving object abruptly reverses direction, the perceived moving objec