کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7321007 1475592 2014 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Mediofrontal event-related potentials in response to positive, negative and unsigned prediction errors
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب رفتاری
پیش نمایش صفحه اول مقاله
Mediofrontal event-related potentials in response to positive, negative and unsigned prediction errors
چکیده انگلیسی
Reinforcement learning models make use of reward prediction errors (RPEs), the difference between an expected and obtained reward. There is evidence that the brain computes RPEs, but an outstanding question is whether positive RPEs (“better than expected”) and negative RPEs (“worse than expected”) are represented in a single integrated system. An electrophysiological component, feedback related negativity, has been claimed to encode an RPE but its relative sensitivity to the utility of positive and negative RPEs remains unclear. This study explored the question by varying the utility of positive and negative RPEs in a design that controlled for other closely related properties of feedback and could distinguish utility from salience. It revealed a mediofrontal sensitivity to utility, for positive RPEs at 275-310 ms and for negative RPEs at 310-390 ms. These effects were preceded and succeeded by a response consistent with an unsigned prediction error, or “salience” coding.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neuropsychologia - Volume 61, August 2014, Pages 1-10
نویسندگان
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