Scanning Short Term Memory auto

Scanning Short Term Memory auto - Scanning Short Term...

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Scanning Short Term Memory Autumn Constance Central Michigan University Abstract The theory of Scanning STM was investigated in the current study. College participants were shown set sizes of numbers and were asked to identify if the probe number shown after was indicated in the set. RT and accuracy were measured among the 15 participants. Memory set size was varied 1 to 6. Probe type was also varied with positive and negative trials. MSS was found to have a significant effect on RT, while probe type did not. MSS had an effect on accuracy while probe type did not. Results showed support for the scanning STM theory.
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Scanning Short Term Memory Scanning STM refers to the recall of memorized information. This is in relation to everyday life in areas of organization, scheduling and memorization of things for a brief time. Scanning STM is the theory developed by Sternberg (1966) which suggests an increased memory set size will increase RT. The difference between serial and parallel search, and exhaustive vs. self- terminating searches were also analyzed. Serial vs. parallel search techniques are determine by the RT for memory set sizes. Exhaustive techniques are usually only used in negative probe trials. Scanning STM theories were tested again by Atkinson ET. Al (1969), whom found similar results to Sternberg using different methods. Results from experimenters such as Corballis (1972) showed no support for the scanning theory suggesting exhaustive searches. Later studies
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were done using Sternberg paradigms by researchers including Rojas (2003) ,and Szymura (2007) which look into activation in cognitive systems and suppression. Sternberg (1966) is thought to be the lead experimenter on the frontier of scanning STM. In his experiment participants were asked to memorize short series of symbols, were shown a test stimulus, and were asked to state whether the stimulus was one of the presented symbols. A pull lever was used to indicate positive or negative response. Results showed a linear regression implying the retrieval process is a fixed set procedure. Sternberg was also trying to determine if the searches were done serially meaning items were searched one at a time or parallel suggesting items were searched all at once. Research also focused on whether the searches were exhaustive meaning items were searched non-stop or if the searches were self-terminating suggesting the participant stopped looking when the answer was recovered. Results indicated a serial search that was self-terminating due to the increased RT with increased memory set size. Sternberg also supported the primacy and recency effect in recalling probe numbers. Primacy and reccency are factors in direct access theory which suggests numbers in the front or back of the set are easier
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Scanning Short Term Memory auto - Scanning Short Term...

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