Subject: Re: All you physiologists ... From: Michael Kubovy <mk9y(at)FARADAY.CLAS.VIRGINIA.EDU> Date: Thu, 25 Jun 1992 14:18:39 -0400--In "All you physiologists ..." (Jun 24, 22:55) "Albert Bregman, Tel: 514-398-6103" wrote: | The fact that offsets also benefit from the suddenness of | the change suggests that Kubovy's name "onset-segregation effect" | may be too specific. Perhaps it is a "sudden-change" segregation | effect. ---------------------------------------------------- I don't have my data on this at hand right now. But I did study offsets (by masking the onsets that followed them) and couldn't get any segregation. I don't remember the spacing between the components (but I believe they were 3-5 semits apart, and all < 1000 Hz). Here's the stimulus: 8 _______________________________ 7 _____________ ________________ |_| 6 ___________________ ___________ |_| 5 _________________________ _____ |_| etc. I.e., a chord of 8 or so components, log-equally spaced, abrupt drops of 6 dB (?), 250 ms long. This sounds like a descending sequence. If you mask the onsets by introducing onsets at all other frequencies, the scale cannot be heard. So I didn't think that it was a sudden-change effect. introducing one at the end of each drop in intensity Cheers, |\ /| / MICHAEL KUBOVY (kubovy(at)virginia.edu) | \/ |/ OFFICE: 804-982-4729; LAB: 982-4751; FAX: 982-4766 | |\ Department of Psychology, Gilmer Hall, | | \ Univ. of Virginia, Charlottesville, VA 22903-2477