WMM

• • The Working Memory Model, proposed by Baddeley and Hitch, describes short-term memory as a system with a central executive, phonological loop, visuospatial sketchpad and episodic buffer
• The central executive 


  responsible for monitoring and coordinating the operation of the slave systems (i.e., visuospatial sketchpad and phonological loop) and relates them to long-term memory
• phonological loop


  deals with spoken and written material. The phonological store (linked to speech perception) acts as an inner ear and holds information in a speech-based form for 1-2 seconds. The articulatory control process (linked to speech production) acts like an inner voice rehearsing information from the phonological store and circulates the information.
• the visuospatial sketchpad


  deals with visual and spatial information.
• the episodic buffer


  acts as a “backup” store which communicates with both long-term memory and the components of working memory.
• KF Case Study


  supports the WMM. KF suffered brain damage from a motorcycle accident that damaged his short-term memory. KF’s impairment was mainly for verbal information – his memory for visual information was largely unaffected. This shows that there are separate STM components for visual information (VSS) and verbal information (phonological loop).
• Baddeley and Hitch