Size of inhibitory areas in crowding effect in peripheral vision V Chikhman, V Bondarko, M Danilova, S Solnushkin |
|---|
Vision laboratory, Pavlov Institute of Physiology, RAS, Russian Federation
|
| We studied the influence of surroundings on the recognition of tests. The tests were Landolt rings of the diameter 1.1, 1.5 or 2.3 deg. They were centered at 13.2 deg from the fixation. The surroundings were similar Landolt rings or circles of the same size and width. The distance between the centers of the test and the surroundings varied from 2.2 to 13.2 deg. The contrast of images was 1.2 times above the threshold for each eccentricity. In one experiment, the observer had to indicate only the location of the gap in the test. In the second experiment, the same task had to be performed, but also the observer had to detect the presence or absence of the gap in the surroundings. In both experiments, deterioration of performance was found at all separations between the test object and the surroundings, but the deterioration was more pronounced when the observer carried out the dual task. The data showed that the size of the inhibitory areas in our case does not comply with the Bouma law [Bouma, 1970, Nature, 226, 177-178]. More deterioration of performance in the dual task reveals the contribution of attention into peripheral crowding effects. Supported by RFH. |
| Up Home |
|---|