Waugh and Norman- serial probe, doesn't support
Peterson and Peterson - trigrams, 18-30 secs
Ltm- Ebbinghaus
Evaluation-
Difficult to test trace decay as if participants are tested after a different time period, they could be rehearsing and thus, strengthening the trace, but if rehersal is prevented by a distractor task, it could be due to Interference from the task, not decay
Trace decay doesn't explain why people rememeber stuff later as if it decays it should never be avaliable
Peterson and Peterson can be used as evidence for the role of decay in stm
Waugh and Norman set out to support trace decay but the results were better explained by interference
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