LT3 - Working Memory Model

LT3 - Working Memory Model

1. AO1

   • Central Executive
     • Attentional Processes
     • Filter to sensory system
     • Direct sensory info to slave systems
     • Very limited capacity
       • BH never tested capacity for CE
         • Info in CE immedaitely allocated to slave system or lost
   • Phonological Loop
     • Limited Capacity
       • 2 Secs
     • Auditory Info
       • Acoustic Encoding
     • Phonological Store
       • Stores Words you hear
     • Articulatory Process
       • Allows maintainence rehearsal
         • Auditory Info looped
   • Visuo-spatial Sketchpad
     • Plan spatial tasks
       • Moving around environment,
     • Limited capacity
       • 3/4 Items (Baddeley)
     • Visual Cache
       • Processes information about visual items
         • Colour, height, width, shape
     • Inner Scribe
       • Processes spatial relationship between items in visual field
         • Spatial Relationship, Visual Field
   • Episodic Buffer
     • Integrates Visual, Verbal, Spatial Info
       • Time sequences them
         • Recording device
           • EB sends info to LTM
     • Added for amensiacs
   • Slave Systems!

2. AO3

   • Strengths
     • P: Supporting Evidence - Shallice & Warrington
       • E1: KF, impaired audio STM, unimpaired visual STM
         • E2: PL impaired, VSS fine
           • L: Supports WMM claims of subdivision
             • CP: Psychological extremes, bad generalisability
     • P: Supporting Evidence
       • E1: Baddeley et al - Dual Task performancce
         • E2: Greater difficulty completing 2 tasks within same slave system than 2 tasks in diff slave systems
           • L: Support BH claims that stores of WM are limited in capacity as function of entire WM reduces when you overload one store
             • CP: Low eco validity?
   • Weaknesses
     • P: Central Executive Oversimplified
       • E1: Eslinger & Damasio - EVR, couldn't problem solve (uses CE) on day-to-day, could do it on paper
         • L: CE isn't complex enough, Subdivide CE, good addition

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