کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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924416 | 921225 | 2012 | 24 صفحه PDF | دانلود رایگان |
Our review of research on PET and fMRI neuroimaging of experts and expertise acquisition reveals two apparently discordant patterns in working-memory-related tasks. When experts are involved, studies show activations in brain regions typically activated during long-term memory tasks that are not observed with novices, a result that is compatible with functional brain reorganization. By contrast, when involving novices and training programs, studies show a decrease in brain regions typically activated during working memory tasks, with no functional reorganization. We suggest that the latter result is a consequence of practice periods that do not allow important structures to be completely acquired: knowledge structures (i.e., Ericsson and Kintsch’s retrieval structures; Gobet and Simon’s templates) and in a lesser way, chunks. These structures allow individuals to improve performance on working-memory tasks, by enabling them to use part of long-term memory as working memory, causing a cerebral functional reorganization. Our hypothesis is that the two brain activation patterns observed in the literature are not discordant, but involve the same process of expertise acquisition in two stages: from decreased activation to brain functional reorganization. The dynamic of these two physiological stages depend on the two above-mentioned psychological constructs: chunks and knowledge structures.
► We review neuroimaging studies on expertise acquisition in WM-related tasks.
► We observe two patterns: a decrease of activity, a cerebral functional reorganization.
► We propose a two-physiological-stage process framework for expertise acquisition.
► We link the first stage to chunks, the second stage to retrieval structures and templates.
Journal: Brain and Cognition - Volume 79, Issue 3, August 2012, Pages 221–244