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Bas Rokers Center for Perceptual Systems Psychology, Neurobiology, INS, & IRC The University of Texas at Austin |
| Research | Publications | Contact Information |
Vision Research DemonstrationWhen an ellipse is rotated around its center in the image plane it can generate a 2D rigid, 2D non-rigid or 3D rigid percept. For a demonstration of the 2D percepts see here. Most observers initially report a 2D percept. In the stimuli below a dot is added to the ellipse to help you achieve the 3D percept. Figure 1 The stimulus will appear to move differently depending on your percept. This can be made explicit by dashing the contour of the stimulus. The stimulus in Figure 2 maintains the same shape as the stimulus in Figure 1, but the motion of the dashed contour appears to be quite different. Figure 2 The dashed stimulus in Figure 2 appears to contain two motion components. In addition to the rotation around the center of the image that the stimuli in Figure 1 and 2 have in common, there appears to be a clockwise rotation around the center of the 3D percept. |