Apparent height of a stereokinetic cone is decreased by departure from circularity.
Subjects made judgements of the comparative height of the stereokinetic cones seen for pairs of rotating figures with varying eccentricity and ellipticity. For any given eccentricity, ellipticity of the figure reduced the apparent height, with narrow ellipses seeming to be shallower. The effect is attributed to an interaction in constancy scaling.
D006801:Humans; D009039:Motion Perception; D012399:Rotation; D012858:Size Perception