Based on the involvement of specific cognitive domains, different definitions of WM have been proposed over the years. Progressively, a consensus was reached acknowledging that WM is extensively involved in goal-directed behaviors in which the retainment and manipulation of specific information is crucial to ensure successful task execution. The multicomponent WM model proposed by Baddeley (2012) described well the concept of WM.
This cognitive ability can be assessed by different tests, such as the Letter–Number Span Test (LNS), digit span tasks, the Operation Span Task (OSPAN), the WAIS-III or Wechsler Memory Scale (WMS-III/WMS-R), or the Response Shifting Task (RST).
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