Multiplicative processes and power laws in human reaction times derived from hyperbolic functions |
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Authors: | José M. Medina |
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Affiliation: | Center for Physics, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal |
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Abstract: | In sensory psychophysics reaction time is a measure of the stochastic latency elapsed from stimulus presentation until a sensory response occurs as soon as possible. A random multiplicative model of reaction time variability is investigated for generating the reaction time probability density functions. The model describes a generic class of hyperbolic functions by Piéron?s law. The results demonstrate that reaction time distributions are the combination of log-normal with power law density functions. A transition from log-normal to power law behavior is found and depends on the transfer of information in neurons. The conditions to obtain Zipf?s law are analyzed. |
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Keywords: | RT, Reaction time pdf, Probability density function ISI, Interspike interval |
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