Linked Life Data

15066405

Source:http://linkedlifedata.com/resource/pubmed/id/15066405

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
12
pubmed:dateCreated
2004-4-6
pubmed:abstractText
Laboratory tasks used to study vision and attention usually require steady fixation, while natural visual processing occurs during the brief pauses between successive saccades. We studied vision and attentional allocation during intersaccadic pauses as subjects made repetitive sequences of saccades. Displays contained six outline squares located along the perimeter of an imaginary circle (diam 4 degrees). Saccades were made in sequence to every other square. The visual task was to identify the orientation (2AFC) of a Gabor test stimulus that appeared briefly (91 ms) along with superimposed noise in one of the squares during a randomly selected intersaccadic pause. Gabor location was cued in advance and noise frames were presented in all squares. Contrast thresholds during intersaccadic pauses were as much as 2-3 times higher than during steady fixation with comparable cueing. Thresholds improved over time during the intersaccadic pause, and the lowest extrafoveal thresholds (statistically indistinguishable from those at the same locations during steady fixation) were found for the location that was to be the target of the next saccade in the sequence. These results show that vision during intersaccadic pauses varies over space and time due to changes in the distribution of attention, as well as to visual suppression that may be related to the execution of the saccades themselves. Generation of sequences of accurate saccades encouraged a strategy of attentional allocation in which resources were dedicated primarily to the goal of the next saccade, leaving little attention for processing objects at other locations.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
0042-6989
pubmed:author
pubmed:issnType
Print
pubmed:volume
44
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1469-83
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2004
pubmed:articleTitle
Dynamic allocation of visual attention during the execution of sequences of saccades.
pubmed:affiliation
Department of Psychology, Rutgers University, 152 Freylinghuysen Rd., Piscataway, NJ 08854, USA. tgersch@rci.rutgers.edu
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, Non-P.H.S.