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CogLab 7- Brown- Peterson

CogLab 7- Brown- Peterson - for several seconds Without...

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COGLAB 7: BROWN- PETERSON TASK BACKGROUND -1940s memory loss was considered to be the result of new information interfering w/ previously learned information -Late 1950s two groups of researchers ( BROWN & PETERSON) published data w/ new interpretation of memory. MEMORY TASK -Participant viewed a trigram of consonants (GKT, WCH) & then performed a number of algebraic computations (counting backwards by 3s) for less than 20 seconds. The data showed that recall of the trigram was less likely as participant worked on algebraic computations for longer durations. However, solving math problems seems to be very different from recalled consonant trigrams, so it was unlikely that there was any interference to disturb memory of trigram. =There exists a short- term memory (STM) system that holds information
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Unformatted text preview: for several seconds. Without active effort by participant, information in STM fades =Performing distractor task prevents participant from actively rehearsing trigram. METHOD-Each trial, participant saw 3 letters (trigram) for 2 seconds. You were given a distractor task that involved counting backwards by threes from a given number. After the distractor task, you were asked to recall the trigram. INDEPENDENT VARIABLE-Duration of the distractor task PARTICIPANT PREDICTION-Distractor task interferes w/ your ability to actively rehearse the trigram of letters. =You can’t do the distractor task & simultaneously repeat the trigram over & over to yourself....
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