東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

The effects of selective attention o...

Highsmith, Jennifer Rea.

Linked to FindBook

Google Book

Amazon

博客來

The effects of selective attention on chromatic processing; pattern-onset VEP responses.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	The effects of selective attention on chromatic processing; pattern-onset VEP responses./
Author:	Highsmith, Jennifer Rea.
Description:	83 p.
Notes:	Source: Dissertation Abstracts International, Volume: 71-06, Section: B, page: 3977.
Contained By:	Dissertation Abstracts International71-06B.
Subject:	Psychology, Psychobiology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3404731
ISBN:	9781124019765

The effects of selective attention on chromatic processing; pattern-onset VEP responses.
Highsmith, Jennifer Rea.

The effects of selective attention on chromatic processing; pattern-onset VEP responses. - 83 p.

Source: Dissertation Abstracts International, Volume: 71-06, Section: B, page: 3977.

Thesis (Ph.D.)--University of Nevada, Reno, 2010.

Intro. Electrophysiological and behavioral studies show that attention improves visual processing. Studies of chromatic steady-state and pattern-reversal visual evoked potentials (VEPs) support this. Typically in these studies VEP stimuli are displayed at one spatial location while distracter stimuli are displayed at a different spatial location. Waveform characteristics are shown to be attenuated when the VEP is unattended. More difficult distractor tasks have also shown to cause decrements in waveform characteristics. Typically, responses from extrastraite visual areas show robust effects with attentional modulations. Recording from lower visual areas such as V1 has not shown consistent attentional effects. Chromatic pattern-onset VEPs are thought to be low-level visual responses recorded over the primary occipital area. They have not been studied under conditions of selective attention. It is important to understand the effects of attentional shifts on the chromatic evoked potential because it has potential importance as a diagnostic tool in clinical settings where monitoring of attention can be difficult.

ISBN: 9781124019765Subjects--Topical Terms:

1017821
Psychology, Psychobiology.

The effects of selective attention on chromatic processing; pattern-onset VEP responses.
LDR:04196nam 2200373 4500 001 1401072
005 20111013150241.5
008 130515s2010 ||||||||||||||||| ||eng d
020 $a 9781124019765
035 $a (UMI)AAI3404731
035 $a AAI3404731
040 $a UMI $c UMI
100 1 $a Highsmith, Jennifer Rea. $3 1680182
245 1 4 $a The effects of selective attention on chromatic processing; pattern-onset VEP responses.
300 $a 83 p.
500 $a Source: Dissertation Abstracts International, Volume: 71-06, Section: B, page: 3977.
500 $a Adviser: Michael A. Crognale.
502 $a Thesis (Ph.D.)--University of Nevada, Reno, 2010.
520 $a Intro. Electrophysiological and behavioral studies show that attention improves visual processing. Studies of chromatic steady-state and pattern-reversal visual evoked potentials (VEPs) support this. Typically in these studies VEP stimuli are displayed at one spatial location while distracter stimuli are displayed at a different spatial location. Waveform characteristics are shown to be attenuated when the VEP is unattended. More difficult distractor tasks have also shown to cause decrements in waveform characteristics. Typically, responses from extrastraite visual areas show robust effects with attentional modulations. Recording from lower visual areas such as V1 has not shown consistent attentional effects. Chromatic pattern-onset VEPs are thought to be low-level visual responses recorded over the primary occipital area. They have not been studied under conditions of selective attention. It is important to understand the effects of attentional shifts on the chromatic evoked potential because it has potential importance as a diagnostic tool in clinical settings where monitoring of attention can be difficult.
520 $a Purpose. The present study measured the effects on the chromatic pattern-onset VEP with spatial and difficult, task-relevant attentional manipulations to show the sensitivity of this response to attentional shifts and the level of this response in the visual system. This study also aimed to determine if participant or patient monitoring is necessary when recording chromatic pattern-onset VEPs.
520 $a Methods. Pattern stimuli were used to selectively activate the L-M and the S-(L+M) visual pathways. Waveform amplitudes and latencies were compared while attention was modulated with distractor tasks. In experiments one through four distractor stimuli were X's and O's presented out of synch with the VEP stimuli. In experiment one the VEP and distractor stimuli were spatially contiguous. In experiment two the VEP and distractor stimuli were spatially separated. In experiment three an achromatic pattern-reversal VEP was recorded with a spatially separate distractor. In experiment four VEP fixation was centrally located with the distractor presented in the periphery. In experiment five the VEP and distractor were presented in the same manner as experiment two, however the distractor was chromatic pattern-onset VEP stimuli identical to the recorded VEP stimuli but presented out of phase with the recorded stimuli.
520 $a Results. Achromatic responses showed significant changes in amplitude and latency with attentional shifts. No significant changes were found for chromatic response in experiments one two, and four. In experiment five there was a marginally significant increase in amplitude for the VEP attention condition in the S-(L+M) pathway only. These results support the idea that chromatic pattern-onset responses may be low-level in the visual system. Additionally, for this response, it may not necessary to monitor attention in a laboratory or clinical setting.
590 $a School code: 0139.
650 4 $a Psychology, Psychobiology. $3 1017821
650 4 $a Psychology, Experimental. $3 517106
650 4 $a Psychology, Cognitive. $3 1017810
690 $a 0349
690 $a 0623
690 $a 0633
710 2 $a University of Nevada, Reno. $b Psychology. $3 1022560
773 0 $t Dissertation Abstracts International $g 71-06B.
790 1 0 $a Crognale, Michael A., $e advisor
790 1 0 $a Webster, Michael A. $e committee member
790 1 0 $a Wessinger, C. Mark $e committee member
790 1 0 $a Nickles, Thomas J. $e committee member
790 1 0 $a Burnham, Melissa M. $e committee member
790 $a 0139
791 $a Ph.D.
792 $a 2010
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3404731