WORKING MEMORY MODEL

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  • WORKING MEMORY MODEL (WMM)
    • CENTRAL EXECUTIVE
      • Monitors incoming data and makes decisions of where to send info. Has a very limited storage capacity.
    • PHONOLOGI-CAL LOOP
      • Deals with auditory info and preserves the order in which the info arrives. Split into two sections
        • Phonological store: stores the words we hear.
        • Articulatory process: allows maintenance rehearsal (repeating sounds or words in a loop to keep them in the working memory).
    • VISUO-SPATIAL SKETCHPAD
      • Stores visual and spatial info when required. Limited capacity of three or four objects.
    • EPISODIC BUFFER
      • Temporary store for info. Integrates visual, spatial and verbal info by maintaining a sense of time sequencing. Basically recording events as they happen. Limited capacity of four chunks.
    • EVALUATION
      • Clinical evidence
        • Research support from Shallice and Warrington (1970) and their patient KF who suffered brain damage.
          • KF had poor STM for verbal info bur could process visual info normally, suggesting just his PL had been damaged and not other areas of the WMM. Meaning there are separate stores for visual and acoustic info.
            • But not reliable because info from brain damaged person so cannot generalise.
      • Dual task performance
        • Baddeley et al's (1995) showed that participants found it harder doing two visual tasks than doing a visual and verbal.
          • Supporting that there must be separate systems because both visual tasks compete for the same system whereas visual and verbal have there own systems so no competition.
      • Lack of clarity over the central executive
        • A lot of psychologists suggest that the central executive has not been clearly specified and doesn't really explain anything. This means the WMM hasn't been fully explained.

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