June 2004
Volume 4, Issue 8
Free
Vision Sciences Society Annual Meeting Abstract  |   August 2004
A new, two pathway model describes the role of selective attention in human vision.
Author Affiliations
  • Jeremy M. Wolfe
    Brigham & Women's Hospital and Harvard Medical, USA
Journal of Vision August 2004, Vol.4, 25. doi:10.1167/4.8.25
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      Jeremy M. Wolfe; A new, two pathway model describes the role of selective attention in human vision.. Journal of Vision 2004;4(8):25. doi: 10.1167/4.8.25.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Visual selective attention limits processing resources to some items at the expense of others. Typical models of selective attention have had a linear sequence of stages in which early vision extracts features that can guide search and support texture segmentation. Subsequently, an attentional bottleneck restricts access to limited-capacity object recognition processes. Three findings demand a change in the model. First, double dissociations between efficient search and effortless texture segmentation undermine the idea of a set of preattentive features common to both tasks. Second, double dissociations between efficient search and item identification under dual task load (VanRullen et al.) implausibly imply that some identifications both require and don't require attention. Finally, some features (e.g. T-junctions, intersections) are available to early vision and to later object recognition process. However, these features do not guide attention in search. In a linear model, how can features be available before and after the bottleneck while being unavailable at the bottleneck? Our new, two-pathway architecture addresses these and other issues. The older, two-stage model is captured in a SELECTIVE PATHWAY running from early vision through a bottleneck to later object recognition processes. Access to the bottleneck is controlled by a GUIDING REPRESENTATION abstracted from the input. We conceive of this as a control system sitting to one side of the selective pathway. Search efficiency is governed by the properties of the selective pathway and guiding representation. A second, NON-SELECTIVE PATHWAY mediates visual processes not subject to a selective bottleneck (e.g. aspects of texture processing and some visual discriminations). The two pathways approach can move discussion beyond debates about “preattentive”, “serial”, and “parallel” processing. Relationships with other two-pathway models (e.g. Ungerleider & Mishkin, 1982 and Goodale, 1996) will be discussed.

Wolfe, J. M.(2004). A new, two pathway model describes the role of selective attention in human vision[Abstract]. Journal of Vision, 4( 8): 25, 25a, http://journalofvision.org/4/8/25/, doi:10.1167/4.8.25. [CrossRef]
Footnotes
 Supported by NIH-NEI and AFOSR
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