| Priming reveals attentional modulation of human motion sensitivity. | |
| | |
MedLine Citation:
|
PMID: 9797982 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
Although recent fMRI and single unit recording studies have shown that attention modulates neural activity in motion sensitive areas of extrastriate cortex, these approaches cannot reveal qualitative or quantitative effects of attention on perception of motion. To investigate this, we asked observers to select one of two orthogonal directions in a brief, transparent dot display (prime) and then measured their sensitivity to global directional motion in a second uni-directional dot display (probe) presented a short time later. When probe direction matched the attended prime direction, sensitivity was degraded. But, when probe direction matched the ignored prime direction, sensitivity was enhanced, even though both components were of equal physical strength. Sensitivity was unchanged for directions opposite to either previously seen direction. Neither sensory adaptation nor opponent direction mechanisms can account for these data. Rather, processes initiated by visual selection must underlie these dramatic changes in motion sensitivity. |
| | |
Authors:
|
J E Raymond; H L O'Donnell; S P Tipper |
Publication Detail:
|
Type: Journal Article |
Journal Detail:
|
Title: Vision research Volume: 38 ISSN: 0042-6989 ISO Abbreviation: Vision Res. Publication Date: 1998 Oct |
Date Detail:
|
Created Date: 1998-11-10 Completed Date: 1998-11-10 Revised Date: 2004-11-17 |
Medline Journal Info:
|
Nlm Unique ID: 0417402 Medline TA: Vision Res Country: ENGLAND |
Other Details:
|
Languages: eng Pagination: 2863-7 Citation Subset: IM; S |
Affiliation:
|
School of Psychology, University of Wales, Bangor, Gwynedd, UK. j.raymond@bangor.ac.uk |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Adaptation, Psychological* Adult Attention / physiology* Humans Motion Perception / physiology* Psychological Tests |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Chronic motion perception deficits from midline cerebellar lesions in human.
Next Document: A model of the contribution of oculomotor and optical factors to emmetropization and myopia.