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  1. 1 Advances in Cognitive Psychology

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  1. 1 Francis G.

  2. 1 Van Horn D.

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  1. 1 2007

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Orientation tuning of a two-stimulus afterimage: Implications for theories of filling-in

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Van Horn D., Francis G.
Advances in Cognitive Psychology
|
2007
|
vol. 3
|
issue 3
375-387
EN
Sequential viewing of 2 orthogonally related gratings produces an afterimage related to the first grating (Vidyasagar, Buzas, Kisyarday, & Eysel, 1999; Francis & Rothmayer, 2003). We investigated how the appearance of the afterimage depended on the relative orientations of the 2 stimulus gratings. We first analyze the theoretical explanation of the appearance of the afterimage that was proposed by Francis and Rothameyer (2003). From the analysis, we show that the model must predict a rapid drop in afterimage occurrence as the gratings deviate from orthogonal. We also show that the model predicts that the shape of the afterimage should always be orthogonal to the second grating. We then report on 2 experiments that test the properties of the model and find that the experimental data are strikingly different from the model predictions. From these discrepancies we identify the key deficits of the current version of the model.
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