false memory

  • Created by: BKW
  • Created on: 20-05-19 15:49
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  • False memory
    • Deese, Roedinger & McDermott paradigm
      • pps shown a series of words highly associated with a lure word eg thread, pin, sewing, sharp, haystack = all associated with needle but needle isn't given
        • on free recall and recognition mem tests pps recall the related lure as often as the rest of the words
          • the lure word was judged to be as vivid and rich in detail as any true mem
    • false memories can be more robust
      • ^ this no of unrelated words in list effects true but not false mem
      • level of processing does not effect false recognition
      • repeated tests following single presentation ^ false mem rate
      • tested at longer delays false memories are better retained than true
    • theories of false mem
      • activation of associative responses
        • Roedier and McDermott 1995
          • During encoding processing words (semantically similar to target) will also activate by association
            • at test pps retrieve info based on activation strength - so a target word is likely to be retrieved
              • pps think they have experienced that word but infact they only thought about it at study
      • Gist mem and sensory reactivation
        • Schacter 1999
          • presented pps with word lists of semantiy related items
            • these items created a theme which is the 'gist' of the list
              • pps then approach the test by relying on gist memory and make semantic related errors
      • evidence from neuroimaging
        • Cabeza et al 2001 looked at true vs false mem
          • pps heard a list of words spoken by 2 diff speakers
            • at test they were asked if they recognised studied, related false and unrelated false words
              • they showed high levels of related false alarms, brain responses to related false items were almost identical to studied items in pre frontal and hippocampal sites
      • evidence from amnesiacs
        • MTL amnesiacs have ppor mem for true items but also less likely to recognise related lures
          • this is said to be due to deficit in gist memory or that item specific mem is impaired
            • Swick and Knight 1999 suggested frontal patients show ^ related false alarms - poss due to an over reliance on gist mem
            • Veraellie et al 2004 large study failed to find clear evidence of frontal lobe damage linking to ^ false alarms and ^ susceptibility to false mem
              • only 3/25 non amnesic patients showed the expected pattern


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