HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Pavlovskaya, M. Articles by Hochstein, S. Search for Related Content PubMed PubMed Citation Articles by Pavlovskaya, M. Articles by Hochstein, S.

Searching with Unilateral Neglect

Loewenstein Rehabilitation Hospital, Raanana
Tel Aviv University

Shaul Hochstein

Hebrew University

We address two longstanding conflicts in the visual search and unilateral neglect literature by studying feature and conjunction search performance of neglect patients using laterally presented search arrays. The first issue relates to whether feature search is performed independently of attention, or rather requires "spread attention." If feature search is "preattentive," it should survive neglect. However, we find neglect effects for both feature and conjunction search, suggesting that feature search, too, has an attentional requirement. The second controversy refers to the space- or object-based nature of neglect following unilateral right-hemisphere parietal lobe damage. If neglect were a purely spatial phenomenon, then we would expect no detriment in performance in the right (nonneglect) field, and diminished performance for the whole left (neglect) field. On the other hand, if neglect were purely object-based, we would expect diminished performance on the left side of the search array, irrespective of its location in the visual field. We now demonstrate a combination of strong object-based and space-based neglect effects for conjunction search with laterally placed element arrays, suggesting that these two mechanisms work in tandem.

This article has been cited by other articles:

				T. M. Van Vleet and L. C. Robertson Cross-modal Interactions in Time and Space: Auditory Influence on Visual Attention in Hemispatial Neglect. J. Cogn. Neurosci., August 1, 2006; 18(8): 1368 - 1379. [Abstract] [Full Text] [PDF]

				A. Kristjansson, P. Vuilleumier, P. Malhotra, M. Husain, and J. Driver Priming of Color and Position during Visual Search in Unilateral Spatial Neglect J. Cogn. Neurosci., June 1, 2005; 17(6): 859 - 873. [Abstract] [Full Text] [PDF]

				R. Ptak and N. Valenza The Inferior Temporal Lobe Mediates Distracter-Resistant Visual Search of Patients with Spatial Neglect J. Cogn. Neurosci., May 1, 2005; 17(5): 788 - 789. [Abstract] [Full Text] [PDF]