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Re: memory for pitch - correction in url
Title: Re: memory for pitch - correction in
url
Dear all,
A couple of people have emailed me to point out an error in
the url I gave in my earlier email today. So I'm resending it with the
url corrected. Sorry for any inconvenience.
Cheers,
Diana
Dear Martin et al,
Indeed - and one of the most surprising
outcomes of this series of experiments was evidence for lateral
inhibition in the pitch memory system. When you present two test tones
for recognition ('same' or 'different') and these are separated by an
interpolated sequence of six tones, the error rate depends
systematically on the pitch relationship between a 'critical
interpolated tone' and the first test tone. As the interval between
these two tones increases in 1/6 tone steps, error rates increase,
peak at an interval of 2/3 tone, and then return to
baseline.See
Deutsch, D. Mapping
of interactions in the pitch memory store. Science,
1972, 175, 1020-1022, posted as a PDF at
http://psy.ucsd.edu/~ddeutsch/psychology/deutsch_publications.htm
Furthermore, error rates increase
substantially when two tones are interpolated, each a semitone removed
from the first test tone.See
Deutsch, D.
Interference in memory between tones adjacent in the musical scale.
Journal of Experimental Psychology, 1973,
100, 228-231.
Most persuasive is the evidence, obtained
with John Feroe, of disinhibition in pitch memory. If a tone that is
2/3 tone removed from the first test tone (the maximally inhibiting
position) is interpolated, and a tone further removed is also
interpolated, which moves at 1/6 tone steps from the maximally
inhibiting tone, you get an orderly disinhibition function, which on
modeling was found to fit a simple Hartline-Ratliff model of a lateral
inhibitory network.
See Deutsch, D. &
Feroe, J. Disinhibition in pitch memory. Perception and
Psychophysics, 1975, 17, 320-324, also posted as a PDF in the
above location.
Cheers,
Diana Deutsch
Dear Diana and others,
you wrote (Monday, May 22):
...... So at least where memory for the
pitch of a
single tone is concerned, performance appears to be substantially
unrelated to rehearsal strategy, and appears to be the function of
a
low-level system that has characteristics which are very similar
to
the system that handles pitch information at the incoming
level.
Your indications of a low-level system for the short-term memory of
pitch is further supported by musical practice and by results of
research in neurophysiology.
1) In music we experience consonance and dissonance not only for
simultaneous tones, but also for non-simultaneous ones. When comparing
the two series of tones C4-F4-A4-C5 and C4-F4-A4-C#5, the first one is
perceived as more consonant than the second. Today we further assume
that this sensitivity for "horizontal harmony" is due to the
structure of the mammalian auditory brain, because also monkeys have
it (Wright et al., 2000).
In order to explain the sensory interaction of non-simultaneous tones,
some kind of internal reverberation was suggested. Clearly, if the
quality of interaction depends on acoustic frequency ratios, the
interaction must occur at a level where neural signals still contain
pitch-related periodicity information. The highest level where this
information is still present is the auditory midbrain (colliculi
inferiores).
2) Bob Zatorre and his team found in two positron emission tomographic
studies (1994, 1996) that imagination of pitch of musical tones led to
a significant activity increase also in the auditory midbrain
(colliculi inferiores).
Zatorre, R.J., Evans, A.C., Meyer, E., 1994. Neural mechanisms
underlying melodic perception and memory for pitch. J. Neurosci. 14,
1908-1919.
Zatorre, R.J., Halpern, A.R., Perry, D.W., Meyer, E., Evans, A.C.,
1996. Hearing in the mind's ear: A PET investigation of musical
imagery and perception. J. Cogn. Neurosci. 8, 29-46.
Wright, A.A., Rivera, J.J., Hulse, S.H., Shyan, M., Neiworth, J.J.,
2000. Music perception and octave generalization in rhesus monkeys. J.
Exp. Psychol. Gen. 129, 291-307.
[I wrote a short comment at:
http://web.telia.com/~u57011259/Wright.htm ]
Cheers,
Martin
----------------------------
Martin Braun
Neuroscience of Music
S-671 95 Klässbol
Sweden
web site: http://w1.570.telia.com/~u57011259/index.htm