The working memory model

• AO1 - central executive

  Supervisory, allocates subsystems to tasks, very limited capacity.
• AO1 - phonological loop

  Auditory information - phonological store and articulatory process (maintenance rehearsal). Coding = acoustic, capacity = 2 seconds of speech
• AO1 - visuospatial sketchpad

  Visual information - visual cache (store) and inner scribe (spatial arrangement). Coding = visual, capacity = 3 or 4 objects.
• AO1 - episodic buffer

  Integrates data from subsystems and records the order of events. Linked to LTM. Coding - flexible, capacity = 4 chunks.
• AO3 - clinical evidence

  KF had poor auditory memory but good visual memory. Damaged PL but VSS fine.
• AO3 - dual-task performance

  Baddeley et al.

  Difficult to do two visual tasks (or two verbal) at same time, but one visual and one verbal is OK
• AO3 - nature of the CE

  Not well specified, needs to be more than 'attention.
• AO3 - validity of the model

  Dual-task studies support WMM but are highly controlled, using artificial tasks (e.g. letter sequences)