کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7272683 1473364 2018 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A neural model of retrospective attention in visual working memory
ترجمه فارسی عنوان
یک مدل عصبی از توجه گذشته نگر در حافظه کاری بصری
کلمات کلیدی
حافظه کاری، نشانه برگشتی توجه کدگذاری عصبی، مدل منابع،
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب شناختی
چکیده انگلیسی
An informative cue that directs attention to one of several items in working memory improves subsequent recall of that item. Here we examine the mechanism of this retro-cue effect using a model of short-term memory based on neural population coding. Our model describes recalled feature values as the output of an optimal decoding of spikes generated by a tuned population of neurons. This neural model provides a better account of human recall data than an influential model that assumes errors can be described as a mixture of normally distributed noise and random guesses. The retro-cue benefit is revealed to be consistent with a higher firing rate of the population encoding the cued versus uncued items, with no difference in tuning specificity. Additionally, a retro-cued item is less likely to be swapped with another item in memory, an effect that can also be explained by greater activity of the underlying population. These results provide a parsimonious account of the effects of retrospective attention on recall and demonstrate a principled method for investigating neural representations with behavioral tasks.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cognitive Psychology - Volume 100, February 2018, Pages 43-52
نویسندگان
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