dc.contributor.advisor |
Ivanoff, Jason, 1974- |
|
dc.creator |
Blagdon, Ryan Andrew |
|
dc.date.accessioned |
2011-06-30T13:12:26Z |
|
dc.date.available |
2011-06-30T13:12:26Z |
|
dc.date.issued |
2010 |
|
dc.identifier.other |
BF444 B53 2010 |
|
dc.identifier.uri |
http://library2.smu.ca/xmlui/handle/01/23060 |
|
dc.description |
iii, 126 leaves : ill. (some col.) ; 29 cm. |
en_CA |
dc.description |
Includes abstract. |
|
dc.description |
Includes bibliographical references (leaves 80-93). |
|
dc.description.abstract |
Selectively attending to either the sensory qualities of a stimulus or the response required by a task can influence the speed and accuracy of performance. Prior fMRI studies have identified medial and lateral prefrontal regions to play a critical role in accommodating speed instructions; however, no neural regions that accommodate improvements in accuracy have been identified. Here event-related fMRI was used to investigate when brain regions respond to speed-accuracy tradeoff manipulations and whether there are distinct brain regions for achieving greater accuracy or greater speed. First, visual-attention regions had greater activation when emphasizing accuracy rather than speed. Secondly, the pre-supplementary motor area increased activation during response preparation when emphasizing speed over accuracy. Lastly, the lentiform nucleus increased activation just prior to the execution of a response when emphasizing speed. Trading speed for accuracy may involve shifting the balance of neural activation between systems that prepare for action and those involved with visuo-spatial attention. |
en_CA |
dc.description.provenance |
Submitted by Dianne MacPhee (dianne.macphee@smu.ca) on 2011-06-30T13:12:26Z
No. of bitstreams: 0 |
en |
dc.description.provenance |
Made available in DSpace on 2011-06-30T13:12:26Z (GMT). No. of bitstreams: 0
Previous issue date: 2010 |
en |
dc.language.iso |
en |
en_CA |
dc.publisher |
Halifax, N.S. : Saint Mary's University |
en_CA |
dc.subject.lcc |
BF444 |
|
dc.subject.lcsh |
Human information processing |
|
dc.subject.lcsh |
Brain mapping |
|
dc.subject.lcsh |
Decision making |
|
dc.title |
Perceptual versus motoric attention : an fMRI investigation of the speed-accuracy tradeoff in decision-making |
en_CA |
dc.type |
Text |
en_CA |
thesis.degree.name |
Master of Science in Applied Science |
|
thesis.degree.level |
Masters |
|
thesis.degree.discipline |
Psychology |
|
thesis.degree.grantor |
Saint Mary's University (Halifax, N.S.) |
|