Re: perception of durational variability (Bruno Repp )


Subject: Re: perception of durational variability
From:    Bruno Repp  <repp@xxxxxxxx>
Date:    Thu, 5 Apr 2007 09:59:40 -0400
List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>

Hi Volker: I don't think there are any data suggesting that people cannot distinguish interval durations at fast rates. The question is how large the differences must be to be detected, and how the magnitude of that difference depends on rate. There is no "breakdown" of discrimination at any rate. It is unclear what your listeners had to do. You are talking about "a big effect of rate on listeners' perception of speech rhythm", but what does this have to do with interval discrimination? What exactly was the effect of rate on perceived speech rhythm, and how did interval durations vary? Best, Bruno >Bruno and Pierre, > >thank you so much for your helpful suggestions! > >The work on rhythm is more what I am looking for. I found a big >effect of rate on listeners' perception of speech rhythm. I assume >that it may have something to do with listeners not being able to >detect interval variability in speech any more when the intervals >under investigation are shorter (typically the case in so called >'syllable-timed languages' because they posses simpler phonotactic >structures). So I am looking for evidence showing at what rate >interval distinction ability breaks down in rhythmic contexts. > >However, all interval durations I am looking at (syllables, c- or >v-intervals) are well below 200 ms in any language I have collected >data on, which, judged by the rhythm findings, would mean that >listeners should not be able to detect durational variability at all >between any of the speech intervals (when judging duration only!) >and that can hardly be true. It probably has to do with the fact >that interval variability in my speech stimuli is much more complex >and do not fulfill the criterion of isochrony in the way they do it >in the Friberg & Sundberg study. I am working on an explanation... > >Best wishes & thanks again, >Volker > >-- >-------------------------------------------- >Volker Dellwo >Department of Phonetics & Linguistics >University College London > >phone: +44 (0)20 7679 5003 (internal: 25003) > >www.phon.ucl.ac.uk >www.phonetiklabor.de >-------------------------------------------- -- Bruno H. Repp Haskins Laboratories 300 George Street New Haven, CT 06511-6624 Tel. (203) 865-6163, ext. 236 Fax (203) 865-8963 http://www.haskins.yale.edu/staff/repp.html


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