Memory

Memory

1. Short and Long-term Memory

   • Capacity
     • JACOBS= digit span 9.3 digits. 7.3 letters.
     • MILLER= people remember 7 items and 7 chunks
     • Size of chunk matters
     • Individual differences
   • Duration
     • STM
       • PETERSON AND PETERSON = Consonant syllables
         • 24 students
         • Recall after intervals of 3-18 secs
         • 90% correct after 3 secs. 2% after 18 secs.
     • LTM
       • BAHRICK = photo recognition test of 50 photos from year book.
         • 90% identified faces after 15yrs. 70% after 48yrs.
         • Free recall= 60% after 15yrs. 30% after 48yrs.
     • Testing is artificial
     • STM -displacement
   • Coding
     • BADDELEY = P's struggled to remember acoustically similar words in LTM
     • Semantically similar struggled in STM
     • LTM tested by 20 minute break. NOT REALLY LTM
     • STM sometimes codes semantically