The apparent density of a group of elements (lines, dots, etc.) is affected by the area of the group itself: the smaller the area, the lower the density of the elements (apparent rarefaction). An explanation of apparent rarefaction, in terms of an averaging model, has been offered by Spinelli and Vicario (submitted for publication). If working in isolation, portions of the retina far from the center would contribute an apparent density different in magnitude from that contributed by the center. Thus, the overall apparent density would be a weighted average of the contributions due to the different portions of the retina. The averaging model has been tested here by functional-measurement methods. The results confirm the model. © 1985, The psychonomic Society, Inc.. All rights reserved.
A functional-measurement study of apparent rarefaction
BRESSAN, PAOLA;MASIN, SERGIO CESARE;VICARIO, GIOVANNI BRUNO;VIDOTTO, GIULIO
1985
Abstract
The apparent density of a group of elements (lines, dots, etc.) is affected by the area of the group itself: the smaller the area, the lower the density of the elements (apparent rarefaction). An explanation of apparent rarefaction, in terms of an averaging model, has been offered by Spinelli and Vicario (submitted for publication). If working in isolation, portions of the retina far from the center would contribute an apparent density different in magnitude from that contributed by the center. Thus, the overall apparent density would be a weighted average of the contributions due to the different portions of the retina. The averaging model has been tested here by functional-measurement methods. The results confirm the model. © 1985, The psychonomic Society, Inc.. All rights reserved.
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