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Peterson and Peterson's Study on Short-Term Memory Decay
Peterson and Peterson (1959) investigated short-term memory using trigrams, which are three-letter sequences such as CLS. Participants were asked to recall these trigrams after delays ranging from 3 to 18 seconds. The results showed that participants recalled approximately 80% of the trigrams after a 3-second delay, but this dropped to only 10% after an 18-second delay, leading the researchers to conclude that short-term memory decays within 18 seconds.
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