Detection of colour changes in a moving object.
The colour-changing stimulus paradigm is based on a tacit assumption that kinematic attributes (velocity, movement direction) do not affect the detection of colour change (). In this study three experiments are reported that clearly demonstrate that the time needed to detect changes in colouration of a moving stimulus becomes shorter with its velocity. The reduction of reaction time with increase of velocity is a purely kinematic effect independent on the reduction of reaction time caused by the stimulus uncertainty effects. It is concluded that colour coding mechanisms are not totally ignorant about movement parameters.
Kreegipuu
Kairi
K
University of Tartu, Estonia and Estonian Centre of Behavioural and Health Sciences, Tiigi 78, Tartu 50410, Estonia. Kairi.Kreegipuu@ut.ee
Murd
Carolina
C
Allik
Jüri
J
D000328:Adult; D001696:Biomechanical Phenomena; D003118:Color Perception / Q000502:physiology*; D015350:Contrast Sensitivity / Q000502:physiology; D005260:Female; D006801:Humans; D008027:Light; D008297:Male; D009039:Motion Perception / Q000502:physiology*; D010775:Photic Stimulation / Q000379:methods; D011597:Psychomotor Performance / Q000502:physiology; D011601:Psychophysics; D011930:Reaction Time; D013998:Time Perception / Q000502:physiology