کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4033855 1603216 2013 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
What’s “up”? Working memory contents can bias orientation processing
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی سیستم های حسی
پیش نمایش صفحه اول مقاله
What’s “up”? Working memory contents can bias orientation processing
چکیده انگلیسی

We explored the interaction between the processing of a low-level visual feature such as orientation and the contents of working memory (WM). In a first experiment, participants memorized the orientation of a Gabor patch and performed two subsequent orientation discriminations during the retention interval. The WM stimulus exerted a consistent repulsive effect on the discrimination judgments: participants were more likely to report that the discrimination stimulus was rotated clockwise compared to the oblique after being presented with a stimulus that was tilted anti-clockwise from the oblique. A control condition where participants attended to the Gabor patch but did not memorize it, showed a much reduced effect. The repulsive effect was stable across the two discriminations in the memory condition, but not in the control condition, where it decayed at the second discrimination. In a second experiment, we showed that the greater interference observed in the WM condition cannot be explained by a difference in cognitive demands between the WM and the control condition. We conclude that WM contents can bias perception: the effect of WM interference is of a visual nature, can last over delays of several seconds and is not disrupted by the processing of intervening visual stimuli during the retention period.


► The orientation of Gabor stimuli was judged after memorizing or attending to Gabors.
► The first stimulus orientation caused misperceptions of subsequent orientations.
► Misperceptions were greater in memory than in control conditions.
► Differences in cognitive demands between tasks cannot explain the results.
► WM contents can interfere with the processing of low-level stimulus features.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Vision Research - Volume 78, 15 January 2013, Pages 46–55
نویسندگان
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