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  • Working Memory Model (STM)
    • Baddeley & Hitch: involves active processing and STM storage
    • central executive
      • acts as a filter, determining which info attended to; processes in all sensory forms, directs info to other slave systems & collects responses; limited capacity
    • visuo-spatial sketchpad (slave system)
      • temporary memory holding visual & spatial info; limited capacity
      • visual cache (visual data of form & colour stored)
      • inner scribe (arrangement of objects is visual field; rehearses/ transfers info in visual cache to CE)
    • phonological loop (slave system)
      • temporary storage; holds auditory/ verbal info; limited capacity
      • phonological store = inner ear (stores words heard)
      • articulatory process = inner voice (allows maintenance rehearsal)
    • episodic buffer (slave system) added by Baddeley in 2000
      • acts as back up, temporary store for visual & acoustic info; communicates between LTM & slave systems
    • supported by dual task studies (easier to do 2 tasks at same time if using diff processing systems)
      • KF motorbike accident brain damage (forgetting of auditory info > visual info) suggests not just 1 STM store
      • Baddeley et al: tracking task w/ imagery task (both involve VSS so difficulty) but w/ tracking task & verbal task = success
        • articulatory suppression = can't verbally rehearse info whilst speaking out loud so rehearsal is prevented
    • little is known about the CE (important part but unclear role), brain studies suggest CE isn't unitary; model doesn't fully explain link between WM and LTM


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