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3 Cards in this Set
- Front
- Back
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PETERSON & PETERSON (DURATION)
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*Pts presented with consonant trigrams
*asked to count back in 3's (to stop rehearsal) *each trial they stopped after and interval of 3-18 secs + asked to recall trigrams correctly >STM has a brief duration when rehearsla is prevented >pts could recall 80% of trigrams correctly after 3 secs >less than 10% could recall correctly after 18 secs Consonant trigrams =meaningless = not memorable low in Eco. validity not a real life situation |
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JACOBS + MILLER (CAPACITY)
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*digit span technique
*pts given strings of unrelated digits that increase by 1 digit every time *didgit span measured at point when pts could no longer recall in correct order >STM capacity is limited >digit span 7+ / -2 >span can be increased by chunking low in Eco.validity as not real life situation |
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CONRAD (ENCODING)
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*showed pts random sequence of six consonants briefly on screen
*two conditions --> B,T,D similar --> Y,R,F different *pts asked to write down in correct order >STM uses mainly acoustic encoding >Pts found similar sound more difficult to recall and made more errors not a real life situation low in Eco.validity University Students low in pop.validity |
