≪Organizer Abstract≫
There are many examples of how conscious visual perception is affected by the history of previous stimulus presentation. These effects are sometimes negative, in that they lead to the opposite percept to the one perceived, while others are positive, facilitating the processing of a repeated stimulus. Examples of low-level adaptation are aftereffects such as motion and color afterimages which are both negative. Secondly, there are mid-level history effects in perception such as from face adaptation, which also are negative. Thirdly, higher-level attention-based history effects have been shown to have a dominating influence upon attention shifts, but these differ from the former in that they facilitate the perception of the same stimulus. The ultimate aim of the symposium will be to try to identify ways in which theoretical accounts of one and the other can mutually inform each other, for a unified conception of how past perception determines present perception.
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