Strings of letters, participants muddled similar sounding sequences. Conrad concluded that the STM encodes info acoustically.
1 of 6
Jacobs (1890)
Investigated serial digit span. Average digit span - just over 7. Average letter span - just over 9. Concluded that the STM can hold 5-9 items at one time.
2 of 6
Peterson and Peterson (1959)
Trigrams, participants had to recall trigrams. 3 sec interval - 80%. 18 sec interval - 2%. Info can remain in STM for approximately 18 secs.
3 of 6
Bahrick (1975)
American participants, yearbooks used. Those who had left school 48 years previously could still remember their classmates. LTM lasts a very long time.
4 of 6
Encoding of LTM
Semantic - according to meaning eg we confuse words that are meaningfully related - hut and shed.
5 of 6
Capacity of LTM
Apparently unlimited.
6 of 6
Other cards in this set
Card 2
Front
Investigated serial digit span. Average digit span - just over 7. Average letter span - just over 9. Concluded that the STM can hold 5-9 items at one time.
Back
Jacobs (1890)
Card 3
Front
Trigrams, participants had to recall trigrams. 3 sec interval - 80%. 18 sec interval - 2%. Info can remain in STM for approximately 18 secs.
Back
Card 4
Front
American participants, yearbooks used. Those who had left school 48 years previously could still remember their classmates. LTM lasts a very long time.
Back
Card 5
Front
Semantic - according to meaning eg we confuse words that are meaningfully related - hut and shed.
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