Coding in STM Clues about coding in STM:. Coding in STM Clues about coding in STM:...

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  • Coding in STMClues about coding in STM:

  • Coding in STMClues about coding in STM:# of items stored in STM depends on rate of speech

  • Coding in STMClues about coding in STM:# of items stored in STM depends on rate of speechphonological similarity effect: similar sounding words are harder to store/recall than different sounding words

  • Coding in STMClues about coding in STM:# of items stored in STM depends on rate of speechphonological similarity effect: similar sounding words are harder to store/recall than different sounding wordsWhat does this suggest about the nature of information in STM?

  • Coding in STMIt seems that information can be stored in a linguistic or phonological form

  • Coding in STMIt seems that information can be stored in a linguistic or phonological formMust it be stored this way?

  • Coding in STMIt is also possible to keep in mind non-verbal information, such as a mapAre there two different STM systems?

  • A Modular Approach to STMAllan Baddeley:Articulatory LoopCentral ExecutiveVisuospatial SketchpadIn general, how can we know if there are one, two, or more independent systems handling some aspect of perception or cognition?

  • Dissociations and Double-DissociationsIndicate that two processes or systems are independent

  • Dissociations and Double-DissociationsA dissociation occurs when one process is influenced by changing a variable but another process is not

  • Dissociations and Double-DissociationsA dissociation occurs when one process is influenced by changing a variable but another process is not

    example: break the sparkplugs in your car and examine the effect on a) your engine b) your radio

  • Dissociations and Double-DissociationsA dissociationPerformanceDamageSparkplugsEngineRadio

  • Dissociations and Double-DissociationsA double-dissociation occurs when changing a variable has different effects on two different processes

    example: break sparkplugs vs break antenna

  • Dissociations and Double-DissociationsPerformanceDamageSparkplugsEngineRadioAntenna

  • Dissociations and Double-DissociationsPerformanceDamageSparkplugsEngineRadioAntenna

  • Working Memory ModulesThe logic of double-dissociation informs us about working memory modules

  • A Modular Approach to STMAllan Baddeley:Articulatory LoopCentral ExecutiveVisuospatial SketchpadThe article by Lee Brooks considers a double-dissociation between Phonological and Visuospatial memory representations

  • Coding in STMModular Approach: Working MemoryAllan Baddeley - two components of Working Memory

    Evidence for a modular system:interference within modalities but not betweenexample: subvocal counting of letters in a list of words is very hard but subvocal counting of the corners of a figure is easy

  • Working Memory ModulesLee Brooks: interference between different representations in STM (Experiment 1)Memory Representationverbal task: categorize words in a sentencespatial task: categorize corners in a block letterResponse Modalityverbal response: say yes or nospatial response: point to yes or no

  • Working Memory Modulesresult:

    Response TimeResponse ModalityVerbalSpatialSpatial Representation(categorize corners)Verbal Representation(categorize nouns)

  • Working Memory ModulesInterpretation:supports notion of modularity in Working Memory (visuospatial sketchpad / articulatory loop)

  • Next Time:Long-Term MemoryRead Loftus for Next Thursday