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Lexical access speed determines the role of working memory in pop-out
Linköping University, The Swedish Institute for Disability Research. Linköping University, Department of Behavioural Sciences and Learning, Disability Research. Linköping University, Faculty of Arts and Sciences. (Linnaeus Centre HEAD)
Linköping University, The Swedish Institute for Disability Research. Linköping University, Department of Behavioural Sciences and Learning, Disability Research. Linköping University, Faculty of Arts and Sciences. Department of Psychology, Queen’s University, Canada. (Linnaeus Centre HEAD)ORCID iD: 0000-0002-7810-1333
Linköping University, The Swedish Institute for Disability Research. Linköping University, Department of Behavioural Sciences and Learning, Disability Research. Linköping University, Faculty of Arts and Sciences. (Linnaeus Centre HEAD)
Linköping University, The Swedish Institute for Disability Research. Linköping University, Department of Behavioural Sciences and Learning, Disability Research. Linköping University, Faculty of Arts and Sciences. (Linnaeus Centre HEAD)
2013 (English)In: Abstract book: Second International Conference on Cognitive Hearing Science for Communication, 2013Conference paper, Oral presentation with published abstract (Other academic)
Abstract [en]

Prior knowledge about what is going to be said produces a clearer percept ofunintelligible noise-vocoded (NV) sentences. This is called the pop-out effect andcan be measured using a magnitude-estimation procedure. Sentence coherencesubstantially improves intelligibility of NV sentences, suggesting that semanticcontext may produce a pop-out effect. Moreover, understanding speech in challengingconditions is supported by cognitive skills such as working-memorycapacity and inference-making. In the present study, we investigated whether apop-out effect could be identified for sentence coherence and whether such a popouteffect would be additive to the pop-out effect generated by prior knowledge.Twenty normal-hearing native Swedish-speaking participants listened to SwedishNV (1, 3, 6 and 12 bands) and clear sentences, and rated the clarity on a 7-pointscale. The sentences were semantically coherent (e.g. “his new clothes were fromFrance”) or incoherent (e.g. “his great streets were from Smith”). Each spokenword was preceded (200 ms) by either its text equivalent or a consonant string ofmatched length. We found a pop-out effect due to sentence coherence as well asa pop-out effect due to prior knowledge. These two effects interacted, suggestingthat they are supported by different mechanisms. Lexical access speed predictedthe magnitude of pop-out due to prior knowledge. Further, in participants withslow lexical access speed, working memory capacity predicted pop-out magnitudewhile in participants with high lexical access speed, pop-out magnitude was bestpredicted by inference-making ability.

Place, publisher, year, edition, pages
2013.
National Category
Social Sciences
Identifiers
URN: urn:nbn:se:liu:diva-105117OAI: oai:DiVA.org:liu-105117DiVA: diva2:703693
Conference
2nd International Conference on Cognitive Hearing Science for Communication, 16-19 June 2013, Linköping, Sweden
Available from: 2014-03-07 Created: 2014-03-07 Last updated: 2017-11-06

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Signoret, CarineJohnsrude, IngridClasson, ElisabetRudner, Mary

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