Figure 1

Trial sequences in Experiment 1.

The small eye and red dotted line depict gaze position. White arrows on the annuli depict rotations of that particular annulus. All trials started with a period of fixation with two static annuli on screen. (A,D) In the fixation trials (Full Match and Long Range) the static annuli were followed by a rotation of one the two annuli (Inducer, 33.3 or 1066.7 ms). The annulus around fixation rotated in case of the Full Match trials, or in the periphery, in case of the Long Range trials and was then succeeded by the presentation of series of 4 different textures (Transient). (B) In the Spatiotopic trials, the peripheral ring started rotating while the eyes remained fixated (Presaccadic inducer). Here, the position of the Presaccadic inducer was spatiotopically matched to the position of the Transient. After an auditory cue, a saccade was initiated to the peripheral, rotating annulus. After the saccade, the annulus rotated around fixation (Inducer) and was then replaced by the Transient. (C) In Retinotopic trials, the position of the Presaccadic inducer was initially around fixation and therefore retinotopically matched to the position of the Transient. After an auditory cue, a saccade was executed and the Inducer was no longer retinotopically matched. Then, the Transient was presented centrally. In all trial types, the Transient would always be presented around the current fixation point. Subjects responded whether they perceived a clockwise or counter clockwise rotational jump, by pressing the right or the left arrow key on a standard keyboard. Note that the Inducer durations as described in this figure correspond to the inducer durations reported in Table 1 (Methods) and Fig. 2 that were analysed.