Fichas
Memory
Fichas del conjunto (5)
- 1Crowder- 1993Found SR only retains info in iconic store for few milliseconds but 2/3 seconds in echoic. Supports idea of different sensory stores.
- 2Sperling- 1960Flashed 3x4 grid of letters onto screen for 1/12 second and asked participants to recall letters of 1 row. Info fades quickly so sounded different tones to indicate row to recall. Recall of info in indicated row was high, suggests all info was originally there- SR capacity is large
- 3Walsh and Thompson- 1978Iconic store has 500 millisecond duration, decreases as get older. Suggests duration of sensory stores is limited and depends on age
- 4Jacobs- 1887Tests STM capacity with serial digital span. Participants presented with increasingly long list of numbers or letters and have to recall in the right order. When participants fail on 50% tasks, they are judged to reach their capacity. Found capacity was 9 items for numbers and 7 for letters. Shows STM capacity is limited
- 5Peterson- 1959Read nonsense trigrams (words (not real words) of 3 letters) then counted back in 3s from a 3-digit number. Found 90% recalled correctly after 3s, 5% after 18s. Suggests STM had capacity 20-30 s.