کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7318514 | 1475563 | 2016 | 71 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Willing to wait: Elevated reward-processing EEG activity associated with a greater preference for larger-but-delayed rewards
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کلمات کلیدی
HEOGVEOGFrontal midline thetacatechol-O-methyltransferase geneFMTERSPFRNITIIQRFDRPCA - PCAVentral striatum - Striatum درشتevent-related spectral perturbation - اختلال طیفی مربوط به رویدادElectroencephalogram - الکتروانسفالوگرافیPrinciple component analysis - تجزیه و تحلیل اجزای اصلanalysis of variance - تحلیل واریانسANOVA - تحلیل واریانس Analysis of varianceDelay discounting - تخفیف تاخیرfMRI - تصویرسازی تشدید مغناطیسی کارکردیfunctional magnetic resonance imaging - تصویرسازی تشدید مغناطیسی کارکردیinter-trial interval - فاصله بین محاکمهinter-quartile range - محدوده بین محوریfeedback-related negativity - منفی مربوط به بازخوردfalse discovery rate - میزان کشف کاذبEEG - نوار مغزیCOMT gene - ژن COMTMonetary incentive delay task - کار تأخیر انگیز مالی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علم عصب شناسی
علوم اعصاب رفتاری
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چکیده انگلیسی
While almost everyone discounts the value of future rewards over immediate rewards, people differ in their so-called delay-discounting. One of the several factors that may explain individual differences in delay-discounting is reward-processing. To study individual-differences in reward-processing, however, one needs to consider the heterogeneity of neural-activity at each reward-processing stage. Here using EEG, we separated reward-related neural activity into distinct reward-anticipation and reward-outcome stages using time-frequency characteristics. Thirty-seven individuals first completed a behavioral delay-discounting task. Then reward-processing EEG activity was assessed using a separate reward-learning task, called a reward time-estimation task. During this EEG task, participants were instructed to estimate time duration and were provided performance feedback on a trial-by-trial basis. Participants received monetary-reward for accurate-performance on Reward trials, but not on No-Reward trials. Reward trials, relative to No-Reward trials, enhanced EEG activity during both reward-anticipation (including, cued-locked delta power during cue-evaluation and pre-feedback alpha suppression during feedback-anticipation) and reward-outcome (including, feedback-locked delta, theta and beta power) stages. Moreover, all of these EEG indices correlated with behavioral performance in the time-estimation task, suggesting their essential roles in learning and adjusting performance to maximize winnings in a reward-learning situation. Importantly, enhanced EEG power during Reward trials, as reflected by stronger 1) pre-feedback alpha suppression, 2) feedback-locked theta and 3) feedback-locked beta, was associated with a greater preference for larger-but-delayed rewards in a separate, behavioral delay-discounting task. Results highlight the association between a stronger preference toward larger-but-delayed rewards and enhanced reward-processing. Moreover, our reward-processing EEG indices detail the specific stages of reward-processing where these associations occur.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neuropsychologia - Volume 91, October 2016, Pages 141-162
Journal: Neuropsychologia - Volume 91, October 2016, Pages 141-162
نویسندگان
Narun Pornpattananangkul, Robin Nusslock,