دانلود مقاله ISI انگلیسی شماره 59389
عنوان فارسی مقاله

بازبینی عدم تقارن ویژوال: سرگردانی ذهن ترجیحا پردازش در میدان بینایی سمت چپ را مختل می کند

کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
59389 2014 7 صفحه PDF سفارش دهید محاسبه نشده
خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.
عنوان انگلیسی
Visual asymmetry revisited: Mind wandering preferentially disrupts processing in the left visual field
منبع

Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)

Journal : Brain and Cognition, Volume 92, December 2014, Pages 32–38

کلمات کلیدی
سرگردانی ذهن ؛ عدم تقارن میدان بینایی - افزایش حسی؛
پیش نمایش مقاله
پیش نمایش مقاله بازبینی عدم تقارن ویژوال: سرگردانی ذهن ترجیحا پردازش در میدان بینایی سمت چپ را مختل می کند

چکیده انگلیسی

An emerging theory proposes that visual attention operates in parallel at two distinct time scales – a shorter one (<1 s) associated with moment-to-moment orienting of selective visuospatial attention, and a longer one (>10 s) associated with more global aspects of attention-to-task. Given their parallel nature, here we examined whether these comparatively slower fluctuations in task-related attention show the same visual field asymmetry – namely, a right visual field bias – as often reported for selective visual–spatial attention. Participants performed a target detection task at fixation while event-related potentials (ERP) time-locked to task-irrelevant visual probes presented in the left and right visual fields were recorded. At random intervals, participants were asked to report whether they were “on-task” or “mind wandering”. Our results demonstrated that sensory attenuation during periods of “mind wandering” relative to “on-task”, as measured by the visual P1 ERP component at electrodes sites contralateral to the stimulus, was only observed for probes presented in the left visual field. In contrast, the magnitude of sensory gain in the right visual field was insensitive to whether participants were “on-task” or “mind wandering”. Taken together, our results support the notion that task-related attention at longer time scales and spatial attention at shorter time scales affect the same underlying mechanism in visual cortex.

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