Detection of motion onset and offset: reaction time and visual evoked potential analysis.

Psychological Research
Kairi Kreegipuu, Jüri Allik

Abstract

Manual reaction time (RT) and visual evoked potentials (VEP) were measured in motion onset and offset detection tasks. A considerable homology was observed between the temporal structure of RTs and VEP intervals, provided that the change in motion was detected as soon as the VEP signal has reached critical threshold amplitude. Both manual reactions and VEP rise in latency as the velocity of the onset or offset motion decreases and were well approximated by the same negative power function with the exponent close to -2/3. This indicates that motion processing is normalised by subtracting the initial motion vector from ongoing motion. A comparison of the motion onset VEP signals in two different conditions, in one of which the observer was instructed to abstain from the reaction and in the other to indicate as fast as possible the beginning of the motion, contained accurate information about the manual response.

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Citations

Apr 14, 2007·Documenta Ophthalmologica. Advances in Ophthalmology·Sven P Heinrich
Apr 25, 2012·Journal of Computational Neuroscience·Timothy Barnes, Ennio Mingolla
Apr 22, 2010·Neurological Research·Simona CarrubbaAndrew A Marino
Jul 24, 2010·Vision Research·Duje TadinDavis M Glasser

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