MEMORY

MEMORY

1. STM

   • DURATION
     • P&P (1959)
       • NONSENSE TRIGRAMS
         • 3secs - 90%
         • 18secs - 2%
         • Population Validity - 24 Students
         • Ecological Validity
   • CAPACITY
     • Miller (1956)
       • 7 +/- 2
         • Jacobs (1887)
           • Immediate Digit Span
             • Digits - 9.3 Letters - 7.3
             • Internal Validity
             • External Validity
         • Cowan (2001
           • Limited to 4 chunks
   • ENCODING
     • Baddeley (1966)
       • ACOUSTIC & SEMANTIC SIMILARITY
         • ACOUSTICALLY SIMILAR - LTM
         • SEMANTICALLY SIMILAR - STM

2. LTM

   • DURATION
     • Shepard (1967)
       • 612 PICS
         • 1 hour - almost perfect
         • 4 months - 50%
         • Ecological Validity
         • Internal validity
     • Bahrick et al. (1975)
       • NAMES TO FACES YEARBOOK
         • 15 years - 90%
         • 48 years - 70%