Short Term Memory

Short Term Memory

1. Capacity = 5-9 items

   • Jacobs
     • Digit Span test: Reading a series of digits that gets progressively longer
       • Conclusion: STM has a limited capacity and old info is displaced by new info
     • Miller
       • Chunking can increase STM capacity

2. Encoding = Acoustic

   • Baddeley
     • Word list - Acoustically similar and dissimilar words
     • Conrad
       • Letter List - Acoustically similar and dissimilar letters

3. Duration = 18 seconds

   • Peterson&Peterson
     • Nonsense Triagram = repeated 7 times
       • Findings
         • 3 seconds = 80% recall
         • 6 seconds = 50% recall
         • 18 seconds = fewer than 10% recall

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