Re: maximum 'tatum' speed perception (Erick Gallun )

Subject: Re: maximum 'tatum' speed perception
From:    Erick Gallun  <gallun(at)SOCRATES.BERKELEY.EDU>
Date:    Mon, 8 Apr 2002 23:10:10 -0700

>>Actually, just to be picky, 8-10 Hz correspond to 100 to 125 ms per tone yes, oops. My apologies for introducing data on much higher rates! Perhaps my error was inadvertently because I am interested in distinguishing between perceiving distinct "events" and sensitivity to very high rates of change. The traditional measures of temporal modulation sensitivity suggest that we can perceive temporal fluctuations well above 20 Hz (up to 800 Hz, for example). However, the quality of what is being detected changes sharply at 10-20 Hz. Is the "tatum" a totally different beast from modulation? Do different mechanisms support it? I'd be interested in what folks think. Again, however, my apologies on the time to frequency conversion error! Erick

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