Capacity Studies R.A

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  • They had to either recall a single row,or the whole grid(50).
  • They did't know which row was to be selected until after they were shown.
  • Letter sequence: A,AO,AOP ,AOPQ...
    • Jacobs (1887)
      • Lab experiment were people were asked to recall letters/digits.
      • Generally, participants could recall a longer string of digits than numbers.
      • Digit sequence: 2,25,258,2589
      • They had to recall them in the order they were in until they no longer could accurate
      • On average they could recall 9.3 digits and 7.3 letters.
      • Jacobs concluded the capacity of the STM to be finite with a capacity of 7+/- 2.


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