کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5705843 1603161 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of pattern masks on the formation of perceptual grouping
ترجمه فارسی عنوان
اثرات ماسکهای الگو بر تشکیل گروه ادراکی
کلمات کلیدی
سازمان ادراکی، روشنایی متداول، گشتالت، یکپارچه سازی قشر
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی سیستم های حسی
چکیده انگلیسی
Mechanisms underlying perceptual grouping serve to bind stimulus components that are contained within grouped patterns. In order to examine the time course of grouping development, grids of spatially isolated dots were followed by pattern masks across a range of SOA. Subjects indicated the predominant perceived grouping of the dot patterns. Masks either spatially superimposed target elements (element mask), or superimposed elements as well as paths among elements (connection mask). Element masks thereby disrupted processing of target elements, while connection masks additionally disrupted representations in regions among elements. It was found that element masks disrupted grouping 12 ms after target offset, after which masks had no effect. Connection masks disrupted grouping up to 47 ms following target offset. Results suggest grouping mechanisms access the afferent signal for a brief period early in processing, after which binding formation proceeds for an addition 35 ms. Shortening connection mask duration to 12 ms enhanced performance during a brief temporal window within the interference period. For each set of conditions, target elements were visible during the time frame in which stimulus patterns could not be perceptually grouped. Full-field checkerboard masks degraded discrimination similarly as connection masks, although were more effective in disrupting discrimination with an SOA of 24 and 36 ms. Degrading stimulus organization progressively extended the time scale for each masking effect. For the grouping of low-level stimulus features tested here, results support a model in which afferent signals are accessed early, followed by progressive binding among grouped elements. Effect of shortening connection masks may reflect incomplete disruption of target processing, or possibly re-entry of stimulus representations by feedback from higher processing areas.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Vision Research - Volume 138, September 2017, Pages 29-39
نویسندگان
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