Dividing attention in the flash-lag illusion.
A dual-task paradigm was used to examine the effect of withdrawing attentional and/or cognitive resources from the flash-lag judgment. The flash-lag illusion was larger, and performance in a detection task was generally poorer, under dual-task conditions than in single-task control conditions. These effects were particularly pronounced when decisions in the two tasks were required simultaneously, as compared to when they could be made sequentially. The results suggest that a time-consuming process is involved in the flash-lag decision, of such a nature that prolonging the process increases the magnitude of the illusion.
Sarich
Dragica
D
Applied Cognitive Neuroscience Research Centre and School of Psychology (MG), Griffith University, Nathan, 4111 Qld, Australia.
Chappell
Mark
M
Burgess
Carly
C
D001288:Attention; D006801:Humans; D007600:Judgment; D008029:Lighting; D009039:Motion Perception; D009903:Optical Illusions; D010775:Photic Stimulation / Q000379:methods