کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4034334 1263448 2011 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Constant spread of feature-based attention across the visual field
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی سیستم های حسی
پیش نمایش صفحه اول مقاله
Constant spread of feature-based attention across the visual field
چکیده انگلیسی

Attending to a feature in one location can produce feature-specific modulation in a different location. This global feature-based attention effect has been demonstrated using two stimulus locations. Although the spread of feature-based attention is presumed to be constant across spatial locations, it has not been tested empirically. We examined the spread of feature-based attention by measuring attentional modulation of the motion aftereffect (MAE) at remote locations. Observers attended to one of two directions in a compound motion stimulus (adapter) and performed a speed-increment task. MAE was measured via a speed nulling procedure for a test stimulus at different distances from the adapter. In Experiment 1, the adapter was at fixation, while the test stimulus was located at different eccentricities. We also measured the magnitude of baseline MAE for each location in two control conditions that did not require feature-based selection necessitated by a compound stimulus. In Experiment 2, the adapter and test stimuli were all located in the periphery at the same eccentricity. Our results showed that attention induced MAE spread completely across the visual field, indicating a genuine global effect. These results add to our understanding of the deployment of feature-based attention and provide empirical constraints on theories of visual attention.

Research highlights
► Attending to a feature increases salience of that feature across the visual field.
► Such increase leads to adaptation effect, even in the absence of visual stimulation.
► The spread of adaptation effect across the visual field is constant.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Vision Research - Volume 51, Issue 1, January 2011, Pages 26–33
نویسندگان
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