On Mon, 07 Jul 2003 10:32:00 -0400 (EDT) [EMAIL PROTECTED] wrote: > The Stroop was OK for me on the second go round, though still not perfect. I > think the problem is that the test is timed, which means that they reject > some correct responses if entered too late. I had two other quibbles:the top note > in the octave is usually viewed as higher than the bottom note, yet they say > it's the same. Also, the MA sound sounded like LA, even ignoring the mouth. >
Those notes are often referred to as "Shepard notes" after the illusion created by Roger Shepard. Each note is composed of multiples of the fundamental frequency, i.e. 1*f, 2*f, 3*f, 4*f ..., so that each note contains all octaves. When the notes are played, the listener can hear the proximal increase in frequency as one goes up the chromatic scale but it is hard to locate the note on the octave scale (as each note contains all octaves). The typical case of this illusion is to repeat the chromatic scale. The illusion is that the pitch continues to rise even though one is repeating the same notes over and over. This effect is due to the local cue of increased frequency from note to note, like Escher's continually-rising staircase. And I didn't look at the mouth, but heard LA also. Ken ---------------------- Kenneth M. Steele, Ph.D. [EMAIL PROTECTED] Dept. of Psychology Appalachian State University Boone, NC 28608 USA --- You are currently subscribed to tips as: [EMAIL PROTECTED] To unsubscribe send a blank email to [EMAIL PROTECTED]
