Is lexical integration really a matter of time? A Hebb learning approach
(2015) 19th Conference of the European Society for Cognitive Psychology — Location: Paphos, Cyprus (17.September.2015)
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- Abstract
- The Hebb repetition paradigm is a serial-order learning task in which participants recall sequences of items (e.g., syllables) with one particular sequence repeated on every nth trial. In 2012, Szmalec and colleagues used the Hebb paradigm as an analogue of novel word-form learning to investigate whether the creation of novel lexical entries requires sleep. Overall, they found that sleep is not crucially involved in lexical consolidation and that the mere passage of time suffices to observe lexical engagement. These findings support the two-stage account of lexical learning, which proposes that novel word-forms are temporarily stored in the hippocampus after which they are gradually transmitted to neocortical structures responsible for the long-term storage of these novel lexical representations. In the current study, we challenge the idea of necessary involvement of time in lexical consolidation, using the same Hebb paradigm. We explored two factors that could possibly contribute to this, namely the strength and the explicitness of the memory traces. We manipulated the strength of the memory trace using criterion learning and the explicitness by announcing half of the Hebb repetitions to the participants. Overall, we observed immediate lexicalization only for the syllable sequences that were learned explicitly and to a criterion of perfect recall. Results are discussed in the light of previous inconsistent findings related to the two-stage account of lexical consolidation.
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Smalle, E., & Szmalec, A. (2015). Is lexical integration really a matter of time? A Hebb learning approach. 19th Conference of the European Society for Cognitive Psychology, Paphos, Cyprus. https://hdl.handle.net/2078.5/237247