Working memory retrieval as a decision process.
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....
| প্রধান লেখক: | , , , , |
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| বিন্যাস: | Journal article |
| ভাষা: | English |
| প্রকাশিত: |
2014
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| _version_ | 1826290428990717952 |
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| author | Pearson, B Raskevicius, J Bays, P Pertzov, Y Husain, M |
| author_facet | Pearson, B Raskevicius, J Bays, P Pertzov, Y Husain, M |
| author_sort | Pearson, B |
| collection | OXFORD |
| description | 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. If WM 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 decision-making account of WM 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 noise-limited, neural representation. |
| first_indexed | 2024-03-07T02:44:03Z |
| format | Journal article |
| id | oxford-uuid:ab70bd10-c75a-4008-8fc2-0a72a23e6acf |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T02:44:03Z |
| publishDate | 2014 |
| record_format | dspace |
| spelling | oxford-uuid:ab70bd10-c75a-4008-8fc2-0a72a23e6acf2022-03-27T03:21:53ZWorking memory retrieval as a decision process.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:ab70bd10-c75a-4008-8fc2-0a72a23e6acfEnglishSymplectic Elements at Oxford2014Pearson, BRaskevicius, JBays, PPertzov, YHusain, MWorking 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. If WM 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 decision-making account of WM 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 noise-limited, neural representation. |
| spellingShingle | Pearson, B Raskevicius, J Bays, P Pertzov, Y Husain, M Working memory retrieval as a decision process. |
| title | Working memory retrieval as a decision process. |
| title_full | Working memory retrieval as a decision process. |
| title_fullStr | Working memory retrieval as a decision process. |
| title_full_unstemmed | Working memory retrieval as a decision process. |
| title_short | Working memory retrieval as a decision process. |
| title_sort | working memory retrieval as a decision process |
| work_keys_str_mv | AT pearsonb workingmemoryretrievalasadecisionprocess AT raskeviciusj workingmemoryretrievalasadecisionprocess AT baysp workingmemoryretrievalasadecisionprocess AT pertzovy workingmemoryretrievalasadecisionprocess AT husainm workingmemoryretrievalasadecisionprocess |