Baddeley and Hitch 1974
The Head of the Model and the 3 Slave systems
Central Executive
Phonological Loop
Visuo-Spatial Sketchpad
Episodic Buffer
Central Executive
Phonological Loop
Processes auditory information (acoustic coding)
Capacity of 2 seconds
Visuo-spatial Sketch Pad
Processes (codes) visual and spatial information
Limited capacity
Episodic Buffer
Added to WMM in 2000 as model needed generalised store to hold and combine info from CE,PL,VSS and LTM
Limited capacity
Positive Evaluations of WMM
Found performance was much better when the tasks were not using the same processing
Suggests the VSS and PL are separate systems
Negative Evaluation of WMM
Studies into memory lack mundane realism making findings ungeneralisable to day to day life