DERIVING A PSYCHOPHYSICAL LAW FOR VELOCITY FROM THE MOTOR LOCALIZATION OF A MOVING TARGET

  • Nuno Alexandre De Sá Teixeira
  • Armando Mónica Oliveira
  • Michel Ange Amorim

Abstract

Asking someone to locate by pointing where a moving target suddenly vanishes reveals anordered dividing relation between target’s velocity and target’s traveled distance. Thispsychological law entails a metric of the “perception-for-action†of velocity, and thereforeallows deriving a proper psychophysical function for velocity. Assuming the mislocalisationerror known as Representational Momentum (forward displacement of the vanishing point) isaimed at compensating for the neural transmission delay, this psychophysical functionprovides useful constraints to the operation of any purported extrapolation mechanism.
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