Working memory retrieval as a decision process

Benjamin Pearson, Julius Raškevičius, Paul M. Bays, Yoni Pertzov, Masud Husain

نتاج البحث: نشر في مجلةمقالةمراجعة النظراء

ملخص

Working memory (WM) is a core cognitive process fundamental to human behavior, yet the mechanisms underlying it remain highly controversial. Here we provide a new framework for understanding retrieval of information from WM, conceptualizing it as a decision based on the quality of internal evidence. Recent findings have demonstrated that precision of WM decreases with memory load. IfWM retrieval uses a decision process that depends on memory quality, systematic changes in response time distribution should occur as a function of WM precision. We asked participants to view sample arrays and, after a delay, report the direction of change in location or orientation of a probe. As WM precision deteriorated with increasing memory load, retrieval time increased systematically. Crucially, the shape of reaction time distributions was consistent with a linear accumulator decision process. Varying either task relevance of items or maintenance duration influenced memory precision, with corresponding shifts in retrieval time. These results provide strong support for a decisionmaking account ofWM retrieval based on noisy storage of items. Furthermore, they show that encoding, maintenance, and retrieval in WM need not be considered as separate processes, but may instead be conceptually unified as operations on the same noiselimited, neural representation.

اللغة الأصليةإنجليزيّة أمريكيّة
الصفحات (من إلى)1-15
عدد الصفحات15
دوريةJournal of Vision
مستوى الصوت14
رقم الإصدار2
المعرِّفات الرقمية للأشياء
حالة النشرنُشِر - 2014

All Science Journal Classification (ASJC) codes

  • !!Ophthalmology
  • !!Sensory Systems

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