Mechanisms for spatial integration in visual detection: a model based on lateral interactions

Usher, M. and Bonneh, Y. and Sagi, D. and Herrmann, M. (1999) Mechanisms for spatial integration in visual detection: a model based on lateral interactions. Spatial Vision, 12 (2). pp. 187-209. ISSN 0169-1015. (The full text of this publication is not available from this repository)

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Official URL
http://dx.doi.org/10.1163/156856899X00111

Abstract

Recent studies of visual detection show a configuration dependent weak improvement of thresholds with the number of targets, which corresponds to a fourth-root power law. We find this result to be inconsistent with probability summation models, and account for it by a model of 'physiological' integration that is based on excitatory lateral interactions in the visual cortex. The model explains several phenomena which are confirmed by the experimental data, such as the absence of spatial and temporal uncertainty effects, temporal summation curves, and facilitation by a pedestal in 2AFC tasks. The summation exponents are dependent on the strength of the lateral interactions, and on the distance and orientation relationship between the elements.

Item Type: Article
Subjects: B Philosophy. Psychology. Religion > BF Psychology
Q Science > QC Physics
Divisions: Faculties > Social Sciences > School of Psychology
Depositing User: F.D. Zabet
Date Deposited: 20 Mar 2009 11:54
Last Modified: 20 Mar 2009 11:54
Resource URI: http://kar.kent.ac.uk/id/eprint/16694 (The current URI for this page, for reference purposes)
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