From: m.usher@psychology.bbk.ac.uk
Date: Mon Feb 05 2001 - 07:48:47 MST
The following article addressing the phenomenon of stochastic resonance (SR),
and which was recently published as a Letter to the Editors in
Biol. Cybern. 83 (2000) 6, L011-L016, can now be accessed from the
following website:
www.psyc.bbk.ac.uk/staff/mu/homepage/noise/SR.pdf
Stochastic resonance in the speed of memory retrieval
Marius Usher and Mario Feingold
Birkbeck College Ben Gurion University
University of London Beer Sheva, Israel
Email: M.Usher@bbk.ac.uk Email: Mario@bgumail.bgu.ac.il
Abstract.
The stochastic resonance (SR) phenomenon in human cognition (memory retrieval
speed for arithmetical multiplication rules) is addressed in a behavioral
and neurocomputational study. The results of an experiment in which
performance was monitored for various magnitudes of acoustic noise are
presented. The average response time was found to be minimal for some optimal
noise level. Moreover, it was shown that the optimal noise level and the
magnitude of the SR effect depend on the difficulty of the task.
A computational framework based on leaky accumulators that integrate noisy
information and provide the output upon reaching a threshold criterion is
used to explain the observed phenomena.
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