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Saccade directions organized into four symmetric axes in world coordinates, for landscape scenes (top) and fractal scenes (bottom). Data show the mean proportions of saccades and standard error bars. Data show the mean proportions and standard errors of head shifts along the four saccade axes (0°/180°, 45°/225°, 90°/270°, and 135°/315°) and the five scene rotation groups (0°, 45°/225°, 90°/270°, 135°/315°, and 180°).
