Introduction to Cognitive Psychology - Department of Psychological ...

Professor Greg Francis 1/6/11!! Network RepresentationProposition!! The proposition connects the appropriate concept nodesProposition!! Network Representationlast SpringDogtimechaserelationagentDogs chase catsJacobagentLast Spring, Jacob fed pigeonsobjectpigeonspigeons inTrafalgar SquareinrelationobjectcatPurdue UniversityrelationfeedslocationTrafalgar SquarePurdue UniversityProposition!! One way of combining concepts!!there are also other theories of how to do this!! Used a lot in Artificial Intelligence!! Do humans represent interactions ofconcepts with propositions?!! Some experimental evidence!! Ratcliff & McKoon (1978)Proposition!! study phase»! subjects are asked to memorize a set of 504 sentences»! 18 - 1 hour sessions!!! test phase»! show words and have subjects decide if they were in thestudy sentences or not»! measure reaction time for words from the sentencesThe bandit who stole the passport faked the signaturePurdue UniversityPurdue UniversityProposition!! Network RepresentationProposition!! In the test phase, a word is given and thesubject responds as quickly as possibleobjectpassportobjectpassportpassportbandit stole passportagentbanditagentfakedrelationbandit stole passportagentbanditfakedrelationbandit faked signaturebandit faked signaturerelationobjectrelationobjectstolePurdue UniversitysignaturestolePurdue UniversitysignaturePSY 200: Intro. to Cognitive Psychology 6