Tracking the Decay of the After-Effect of Seen Rotary Movement

Abstract

A compensatory tracking method for continuous measurement of the after-effect of seen rotary movement is described. Typical decay curves are exponential after short inspections, but after longer inspections, an initial period of exponential decay is followed by a second phase, also of exponential decay, but with a longer time constant. Within the framework of the psychophysical theory of figural after-effects, the effects of inspection time and rotation speed of the inspection disc on immediate after-effect and on decay rate are shown to be compatible with those observed in static figural after-effects.