Visibility of an afterimage alone and in the presence of,one or two additional afterimages |
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| Authors: | Peter Taves Janette Atkinson |
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| Institution: | 1. The Johns Hopkins University, 21218, Baltimore, Maryland
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| Abstract: | The total time for which a circular afterimage is visible has been found to be increased by the presence of one or two additional afterimages. This increased’ visibility, which has been called “facilitation, ” is greater the nearer the afterimages are to one another, being optimum at .25 deg and declining to zero at 2.0 deg separation. |
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