Re: Rhythm (Mari Jones )

Subject: Re: Rhythm
From:    Mari Jones  <jones.80(at)OSU.EDU>
Date:    Mon, 24 Nov 1997 09:52:35 -0500

>Date: Sun, 16 Nov 1997 13:52:49 >To: AUDITORY(at)VM1.MCGILL.CA >From: Mari Jones <jones.80(at)> >Subject: Re: Rhythm > > >> >> >>Dear List, >>In Repy to Hartmann's query: >> >>More info for Boogie Bob on JND's in rhythms. I agree with Pierre Divenyi and Devin McAuley (and others): context is all important. Here are just a few contextual factors that affect temporal JNDs when measured in "musiclike" contexts: tempo (McAuley, Drake & Botte, Jones & Yee), length of preceding string of time intervals (Drake and Botte, Schultze), melodic interval size (van Noorden, Divenyi, Monahan & Hirsh, Jones, Jagacinski et al. ), the amount of temporal modulation of tempo (in some cases even remotely preceding an isochronous test region in which time discrimination is measured] (Drake & Botte, Large & Jones), metric regularity (Jones & Yee); and in a current experiment here.... polyrhythmic complexity (Barnes & Jones). >>I have probably left out other relevant experiments by many members on this list and so I apologize (I hope ... probably will... >>to hear from you) >>At 08:55 AM 11/19/97 -0500, you wrote: >>>Dear List, >>> >>>This is a question about the ability to perceive irregularity in >>>rhythm. It comes from Boogie Bob, Lansing's foremost rhythm and blues >>>artist. >>> >>> What is the JND for perceiving an unequal division of a beat into >>>two notes? >>> >>> A quarter note beat could be divided into two eighth notes. >>> Theoretically, that would be a 50-50 division. >>> >>> It could be divided into a dotted quarter and a sixteenth. >>> That would be a 75-25 division, clearly different from 50-50. >>> >>> Can you distinguish between 75-25 and 67-33? How about 75-25 >>> vs 70-30? >>> >>>Presumably the answer depends somehow on the tempo. How? >>> >>>Because this is a question about rhythm and not about the perception of tone >>>duration, there needs to be a context. Probably it's best to think of a >>>regular and indefinite repetition of the two-note sequence in question. >>>That establishes the tempo and context. >>> >>>Anybody out there with information on this subject? >>> >>>Next: how about the ability to reliably PRODUCE such a division? >>> >>>Thanks, >>>Bill >>> >>> >> > ____________________________________________________________________________ __________________________ Mari Riess Jones Department of Psychology 142 Townshend Hall The Ohio State University, Columbus, Ohio 43210 Phone: 614-292-4206 Fax: 614-292-5601 ____________________________________________________________________________ ___________________________

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