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The role of sparsely distributed representations in familiarity recognition of verbal and olfactory materials
Lund University.
Lund University.
Lund University.
Högskolan Kristianstad, Fakulteten för lärarutbildning.
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2018 (Engelska)Ingår i: Cognitive Processing, ISSN 1612-4782, E-ISSN 1612-4790, Vol. 19, nr 4, s. 481-494Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

We present the generalized signal detection theory (GSDT), where familiarity is described by a sparse binomial distribution of binary node activity rather than by normal distribution of familiarity. Items are presented in a distributed representation, where each node receives either noise only, or signal and noise. An old response (i.e., a "yes" response) is made if at least one node receives signal plus noise that is larger than the activation threshold, and item variability is determined by the distribution of activated nodes as the threshold is varied. A distinct representation leads to better performance and a lower ratio of new to old item variability, than a more distributed and less distinct representations. Here we apply the GSDT to empirical data on verbal and olfactory memory and suggest that verbal memory relies on a distinct neural item representation, whereas olfactory memory has a fuzzy neural representation leading to poorer memory and inducing a larger ratio of new to old item variability.

Ort, förlag, år, upplaga, sidor
2018. Vol. 19, nr 4, s. 481-494
Nyckelord [en]
Memory, Model, Olfactory, Receiver operating characteristic (ROC), Recognition, Signal detection theory, Verbal
Nationell ämneskategori
Psykologi
Identifikatorer
URN: urn:nbn:se:hkr:diva-18013DOI: 10.1007/s10339-018-0862-9ISI: :000446545400002PubMedID: 29679290OAI: oai:DiVA.org:hkr-18013DiVA, id: diva2:1201314
Tillgänglig från: 2018-04-25 Skapad: 2018-04-25 Senast uppdaterad: 2018-10-25Bibliografiskt granskad

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Johansson, Marcus

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