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Explicit/Implicit Memory Poster Nick Morse Jon Hoover Greg Marquart Explicit Memory • Explicit describe memory in “episodic” terms • Example – If one were to see a word like “bike,” one might likely recall a specific bike one possessed, and perhaps a distinct event related to it. Explicit Memory Episodic Implicit Memory • Implicit memory is knowledge we have no conscious access to. • “Semantic” • Example – If one were to see the word “pessimism,” one might have a good idea of the term without a specific recollection of it. Implicit Memory Semantic The Question at Hand • Do the explicit and implicit memory systems employ separate areas of the brain to carry out their functions? – How can we test this? – What can we conclude from the results? Methodology • Presented the subject twice with a list containing words representing two separate conditions that might indicate a dissociation of memory – Concrete words (200 words) • bike, desk, chair – Abstract words (200 words) • pessimism, freedom, happiness • The subject was then exposed to the original 400 words a second time, plus 200 new distractor words, • After viewing each word, he was asked to label it as “Remember,” “Know,” or “New” Results • Compared overall brain activity between “remember” and “know” responses • Brain activity for both was highest at the P4 electrode • No significant difference was evident Results (cont.) • Greater brain activity for the “Remember” responses in the concrete condition than in the “know” response Results (cont.) • Conversely, there was less brain activity for the “Remember” responses in the abstract condition than in the “Know” response. Conclusion • Data collected did not support two separate memory systems – explicit and implicit • Interesting result… – Data supported a difference in the way that one remembers certain terms, in our case abstract and concrete words • Concrete words elicited greater “Remember” responses • Abstract words elicited greater “Know” responses