is based on the theory that forgetting occurs as a result of the automatic decay or fading of the memory trace. Trace decay theory focuses on time and the limited duration of the short term memory. Trace decay theory suggests that memory can only hold information for 15 to 30 seconds without it being rehearsed. the theory states that information decays and fades after this.
it's not all that much direct support for this deacy theory in terms of explaining the loss of information from short-term to long term memory. one of the problems with decay theory is that it is code to impossible to test it. in theory it would be fully possible. but in reality it is not possible to create a situation in which there is a blank period of time between the presentation of material and recall. Having presented information participants will rehearse it. If you prevent rehearsal by introducing a distracter task, it results in interference.
Decay theory has difficulty explaining the observation that many people can remember events that happened several years previously with great clarity, even though they haven't thought about them during the intervening period. If our memories gradually decayed over time, then people should not have clear memories of distant events which have lain dormant for several years. However, there is evidence to suggest that information is lost from sensory memory through the process of decay (Sperling, 1960).





































