Aim - To investigate the duration of STM.
Procedure - Asked P's to recall strings of consonants (e.g FBK) selected. Recall delay was set to 3, 6, 9, 12 seconds during which rehearsal was prevented by participants counting backwards in threes from a target number. Each subject was tested a total of 8 times at each of the 6 delay intervals.
Results - While after a 3 second retention interval trigram about 80% of trigams were recalled, after 18 seconds only 10% were recalled.
Conclusion - information disappeared or decayed rapidly from STM if not rehearsed.
Evaluation - Consent must be gained.
- Trigrams are artificial and do not reflect on how we remember things in daily life.
- Trigrams presented in earlier trials caused confusion and therefore were recalled incorrectly.
- Possible that loss of information is down to capacity limitations rather than duration.
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