The contribution of stimulus-driven and goal-driven mechanisms to feature-based selection in patients with spatial attention deficits.
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The contribution of stimulus-driven and goal-driven mechanisms to feature-based selection in patients with spatial attention deficits. / Dombrowe, Isabel; Donk, Mieke; Wright, Hayley; Olivers, Christian N L; Humphreys, Glyn W.
In: COGN NEUROPSYCHOL, Vol. 29, No. 3, 3, 2012, p. 249-274.Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review
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TY - JOUR
T1 - The contribution of stimulus-driven and goal-driven mechanisms to feature-based selection in patients with spatial attention deficits.
AU - Dombrowe, Isabel
AU - Donk, Mieke
AU - Wright, Hayley
AU - Olivers, Christian N L
AU - Humphreys, Glyn W
PY - 2012
Y1 - 2012
N2 - When people search a display for a target defined by a unique feature, fast saccades are predominantly stimulus-driven whereas slower saccades are primarily goal-driven. Here we use this dissociative pattern to assess whether feature-based selection in patients with lateralized spatial attention deficits is impaired in stimulus-driven processing, goal-driven processing, or both. A group of patients suffering from extinction or neglect after parietal damage, and a group of healthy, age-matched controls, were instructed to make a saccade to a uniquely oriented target line which was presented simultaneously with a differently oriented distractor line. We systematically varied the salience of the target and distractor by changing the orientation of background elements, and used a time-based model to extract stimulus-driven (salience) and goal-driven (target set) components of selection. The results show that the patients exhibited reduced stimulus-driven processing only in the contralesional hemifield, while goal-driven processing was reduced across both hemifields.
AB - When people search a display for a target defined by a unique feature, fast saccades are predominantly stimulus-driven whereas slower saccades are primarily goal-driven. Here we use this dissociative pattern to assess whether feature-based selection in patients with lateralized spatial attention deficits is impaired in stimulus-driven processing, goal-driven processing, or both. A group of patients suffering from extinction or neglect after parietal damage, and a group of healthy, age-matched controls, were instructed to make a saccade to a uniquely oriented target line which was presented simultaneously with a differently oriented distractor line. We systematically varied the salience of the target and distractor by changing the orientation of background elements, and used a time-based model to extract stimulus-driven (salience) and goal-driven (target set) components of selection. The results show that the patients exhibited reduced stimulus-driven processing only in the contralesional hemifield, while goal-driven processing was reduced across both hemifields.
KW - Humans
KW - Case-Control Studies
KW - Visual Fields/physiology
KW - Visual Perception/physiology
KW - Photic Stimulation/methods
KW - Reaction Time/physiology
KW - Saccades/physiology
KW - Goals
KW - Perceptual Disorders/physiopathology
KW - Humans
KW - Case-Control Studies
KW - Visual Fields/physiology
KW - Visual Perception/physiology
KW - Photic Stimulation/methods
KW - Reaction Time/physiology
KW - Saccades/physiology
KW - Goals
KW - Perceptual Disorders/physiopathology
M3 - SCORING: Journal article
VL - 29
SP - 249
EP - 274
IS - 3
M1 - 3
ER -
