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Re: perecption of durational variability

>> Hi Pierre:
>> Were those data obtained in rhythmic contexts? What is your take on
>> the data summarized by Friberg and Sundberg (1995)? They clearly
>> show a discontinuity at 200-300 ms.

> Bruno, No, the data I was referring to were all collected using mostly > 2AFC methods to compare two time intervals separated by a longer
> intertrial interval selected to avoid the impression of synchrony.
> Thus, the experiments had little if anything in common with Friberg's
> and Sundberg's study. Pierre At 11:34 AM 4/4/2007, Bruno Repp wrote:

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 Dellwo
Department of Phonetics & Linguistics
University College London

phone: +44 (0)20 7679 5003 (internal: 25003)