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Higher-order effects.

In this chapter, the authors consider some potential high-level influences on the strength and direction of the motion aftereffect (MAE), and their implications for psychophysical and neural theories of motion perception. They focus on a wide range of stimuli and paradigms, including dynamic tests, higher-order stimuli, multivectorial motion, and brief adaptation periods. They also consider the effects of the observer's state of attention and the demands of the task, showing that both can influence the direction and size of the effect. These issues suggest that the MAE is not necessarily a unified phenomenon resulting only from low-level, preattentive processing of unidirectional motion from luminance cues. Rather, the MAE may have a wide range of influences and consequences, some of which are dependent on the particular stimuli and the observer's state of mind. (PsycINFO Database Record (c) 2007 APA, all rights reserved)



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