Working memory retrieval as a decision process

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

42 Scopus citations


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.

Original languageAmerican English
Pages (from-to)1-15
Number of pages15
JournalJournal of Vision
Issue number2
StatePublished - 2014


  • Decision
  • Precision
  • Response time
  • Retrieval
  • Working memory


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