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Learning and Memory. Computational Cognitive Neuroscience Randall O’Reilly. Major Types of Memory. ?. Major Types of Memory. Weight-based (changes in synapses) Long lasting, persist over distraction, etc Very high capacity Activation-based (sustained neural firing)

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learning and memory

Learning and Memory

Computational Cognitive Neuroscience

Randall O’Reilly

major types of memory1
Major Types of Memory
  • Weight-based (changes in synapses)
    • Long lasting, persist over distraction, etc
    • Very high capacity
  • Activation-based (sustained neural firing)
    • Transient, easily lost
    • Very flexible: mental arithmetic, etc.
major types of memory2
Major Types of Memory
  • Episodic Memory: events, facts, etc
    • Hippocampus
  • Familiarity-based recognition
    • Perirhinal cortex: you look familiar, but…
  • Weight-based priming
    • Subconscious, can be very long-lasting
  • Activation-based priming
    • Also subconscious, but transient..
episodic memory
Episodic Memory
  • Autobiographical memory (life events)
  • Arbitrary new memories (lab tasks)
classic lab task ab ac
Classic Lab Task: AB-AC
  • Learn AB paired associates:
    • window-reason
    • bicycle-garbage
    • ...
  • Then AC paired associaties:
    • window-locomotive
    • bicycle-dishtowel
ab ac
AB-AC
  • Test on AB list:
    • Window ?
    • Bicycle ?
  • And AC list:
    • Window ?
    • Bicycle ?
hippo project
Hippo Project
  • Run hip.proj
priming
Priming
  • Can a brief subliminal message influence your behavior?
two forms of memory
Two Forms of Memory
  • Priming provides good window onto weight vs. activation based memories.
    • Demos: wt, act priming
more robust activation based memory
More Robust Activation-Based Memory
  • In Executive Function Chapter:
    • PFC robust active maintenance over secs to mins
    • BG provides dynamic gating signal for updt vs. maint
    • Used for “working memory”, cognitive control..
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