Introduction to Cognitive Psychology - Department of Psychological ...

Prof. Greg Francis 8/16/11Two store modelPSY 200Greg FrancisLecture 15!! Simple viewMemory!!memory is a container of past impressions andknowledge!!memories can leak-out, decay away!! Not very realistic!!need to explain why memories disappearWhy it is difficult to win a pizza at LittleCaesar’s.Purdue UniversityPurdue UniversitySimple view!! The container theory of memory does not explain, forexample,!! why some memories are very long lasting (my childhood cartrips to Utah)!! why some memories are very brief (my wife asks me to takeout the trash)!! We are not going to get a full theory of memory, butwe can start to get an outline!! and identify some misconceptions about memoryEbbinghaus’ experiments!! First memory experiment (1885)!! Measure how long it takes to learn a list of nonsensesyllables perfectly!! NOF, QAP, HOS, LEQ, FIK, MEC, KIJ, HOM, NEM, MOJ!! How long does the memory last?!! In what form does the memory last?!! How does it affect future behavior?!! Does it help relearn the list at a later time?Purdue UniversityPurdue UniversityEbbinghaus!! Relearn the list at later points in time!!a different list each time!! Measure how long it takes to relearn the list!! Calculate savingsSavings = TimeoriginalTime! TimeoriginalPurdue UniversityrelearnForgetting curve!! Savings =1!! subjects do not need to relearn, perfect memory!! Savings=0!! subjects show no evidence of earlier learningSavings1.210.80.60.4Still not 0!0.200 5 10 15 20 25 30Time (days)Purdue UniversityPSY 200: Intro. to Cognitive Psychology 1