grouping and streaming ("W. M. Hartmann" )

Subject: grouping and streaming
From:    "W. M. Hartmann"  <hartmann(at)PA.MSU.EDU>
Date:    Sat, 12 May 2001 00:02:32 -0400

This is a multi-part message in MIME format. --------------041D8C198C0FF7F847FBD0CD Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit --------------041D8C198C0FF7F847FBD0CD Content-Type: text/plain; charset=us-ascii; name="group.txt" Content-Transfer-Encoding: 7bit Content-Disposition: inline; filename="group.txt" In connection with comments by Bruno Repp and Chuck Watson on definitions for "grouping" and "streaming" ... Auditory Grouping vs Stream Segregation - An Idiosyncratic Perspective Auditory grouping is really important! It is the wonderful process by which we sort out sounds, making sense of our auditory world - assigning perceived elements to different sources or to backgrounds such as noise or reverberation. Important though it is, auditory grouping turns out to be hard to study. Then there is stream segregation. It started with the trill threshold by Miller and Heise, Richard Warren and company, Leon van Noorden's thesis, Al Bregman and innumerable coauthors, Jay Dowling, and others. This is the sequential pattern, the ya da ya da ya da, that we all know and love. Stream segregation turns out to be easier to study. Partly that's because it is almost entirely attributable to peripheral channeling - tonotopic and lateral. Why should there be confusion about the difference between auditory grouping and stream segregation? (1) Stream segregation is a part of grouping. It would be nice to think that by understanding stream segregation we understand something about grouping. There is a natural tendency to want to think so. Maybe it's even partly true. (2) About a decade ago - say 1988-1992 - a gang of bright and enthusiastic computer guys from Britain decided that grouping and streaming were such similar concepts that both could be called "streaming." This they proceeded to do. They did it a lot and loudly. The honchos of stream segregation knew better, of course, but they let it pass. For the reason that they let it pass see (1). Best, Bill --------------041D8C198C0FF7F847FBD0CD--

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