capacity: psychology aqa AS

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  • Created by: tommy
  • Created on: 30-11-11 17:14

Capacity of STM

the capacity of STM can be asses using a technique called "digit span".

Joseph Jacobs (1887)

used this technique to asses the capacity of STM.

  • He found that the average span for digits was 9.3.
  • letters was 7.3.
  • Jacobs suggests that it may be because there are only 9 digits while there are 26 letters.



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