Figure 6.

Control experiments support the idea that cue-specific MAEs are not merely contingent on temporal monocular characteristics. A, Variant of the adaptation procedure used in Experiment 4 consisted of alternating 3D motion directions (toward or away, 0.5 Hz) presented using IOVD stimuli with alternating long-lifetime (200 ms) or short-lifetime dots. Short dot lifetimes were set to either 66.7 or 33.3 ms in separate experiments. Test stimuli always contained long-lifetime IOVD dots. B, MAE magnitudes for the long-lifetime IOVD test stimuli in each control experiment. MAEs in the direction opposite of the long-lifetime adaptor were greatly reduced when alternated with short-lifetime adaptation in the opposite direction (which, despite the shorter lifetime, still clearly conveyed 3D direction; left bar). However, when alternated with ultra-short-lifetime dots (i.e., lifetimes so short that they yielded a weak or absent impression of 3D motion), the MAE magnitude was equal to that seen when paired with a CD stimulus in the previous experiment (dashed lines). Error bars indicate 95% CIs.