The Interaction Between LongTerm Memory and ShortTerm Memory

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The Interaction Between Long-Term Memory and
Short-Term Memory

• Dr. Ayanna Thomas
• PS111 March 14, 2007

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What is the Duration of STM?
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The Modal Modal
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Evidence for the Distinction between STM and LTM
The serial-position curve of memory
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Effects of Delay Glanzer Cunitz (1966)
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Further Evidence for 2 Stores

• Patient HM (Milner, 1966)
• Amnesiac after removal of temporal lobes. Cannot
  recall and recognize things after a delay, but
  STM is fine.
• Patient KF (Warrington Shallice, 1969)
• Motorbike accident leading to left
  parieto-oiccipital damage. Good recall of
  stories, long word lists, etc, but 2 digit span
  only.

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Distinction through Double Dissociation

• Different deficits of these patients suggest that
  different areas of brain damage effect different
  aspects of memory. This is called a double
  dissociation.

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More Than Rehearsal

• What is going on in STM according to Modal Model?
• STM is not really as passive as was originally
  conceived
• Re-conceptualization of STM into Working Memory

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From STM To Working Memory

• Short-term memories are active contents of the
  mind
• Typically conceived as the by-products or end
  results of a perceptual analysis
• Working memory is a more inclusive term
• internal machinery that collectively selects
  short-term memories
• maintains memory in an active state
• underlies most on-line psychological functioning

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Working Memory Model (Baddley Hitch, 1974)

• Active rather than passive
• PL stores and rehearses verbal/auditory
  information
• VSSP stores and rehearses visual and spatial
  information
• CE controls and coordinates these slave systems
• The way in which information is handled in WM can
  influence the likelihood that it will pass into
  LTM