Reaction time to motion onset relative to background motion
Nele Kuldkepp · DSpace repository (University of Tartu) · 2007
The dependency of target motion detection on the velocity and direction of the background motion was investigated using a disc (either 8.26º or 1.2º in diameter) filled with a sinusoidal grating as a stimulus and by varying the gap (either 1.2º or 0.03º) between the target area and background grating.Background moving in the same direction to the target prolonged RT-s to target motion onset.Background effects were stronger for the small target.Also in case of small target area the background moving in the opposite direction prolonged the RT-s (in the conditions with gap 0.03º).In the control experiment subjects had to discriminate the direction of the target area and made more mistakes when both (the target and the background) were moving < 1.0 º/s.