Memory- duration
- Created by: Izzy
- Created on: 01-12-14 17:02
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- Memory- duration
- Short term
- Limited duration (18 seconds)
- Peterson and Peterson
- Trigram retention experiment. Participants read nonsense trigrams then counted backwards (distractor task prevents rehearsal)
- 90% recalled after 3 seconds
- 6% recalled after 18 seconds
- +Lab experiment (well controlled and standardised- can be replicated) -artificial stimuli (lacks ecological validity)
- Trigram retention experiment. Participants read nonsense trigrams then counted backwards (distractor task prevents rehearsal)
- Long term
- Limitless capacity. Duration= life time (but can decline with age)
- Bahrick: 392 graduates
- Recognition better than recall. Dip in performance after 47 years. Spaced learning retained than intensive recall.
- +Natural stimuli (high ecological validity) -can't generalise to other bits of information (emotional significance) -lacks population validity (biased sample)
- Short term
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