Abstract
In the flash-lag illusion, a flash and a moving object in the same
location appear to be offset. A series of psychophysical experiments
yields data inconsistent with two previously proposed explanations:
motion extrapolation (a predictive model) and latency difference (an
online model). We propose an alternative in which visual awareness is
neither predictive nor online but is postdictive, so that the percept
attributed to the time of the flash is a function of events that
happen in the ~80 milliseconds after the flash. The results here show
how interpolation of the past is the only framework of the three
models that provides a unified explanation for the flash-lag
phenomenon.
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