Flash-Lag Effect: Differential Latency, Not Postdiction

continuously moving object typically is perceived to lead a flashed object in space when the two retinal images are physically aligned, a phenomenon known as the flash-lag effect (1). Eagleman and Sejnowski (2) recently published data that they interpreted to disagree with a previous explanation of this phenomenon, the differential-latency hy-pothesis (3–7), and to support instead a post-diction hypothesis (8). Here we demonstrate that the data presented in (2) are fully con-sistent with the differential-latency hypothe-sis. We also provide evidence that rejects postdiction as an explanation for the flash-lag phenomenon