PSYC 380 Lecture Notes - Lecture 8: Necker Cube, Stick Figure, Walking Stick
17 Mar 2017
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Visual illusions can always be characterized by some kind of paradox: types of conflicts, cause of conflicts. Different, conflicting answers to the same question: discrepancy between measured and perceived grey level (or colour, length, shape, size motion, conflicts between different sub-modalities about depths, size, and motion. Or is it: local consistency, global conflicts. Depth ambiguity and perceptual biases: convexity, light-from-above, viewer-from-above: depth ambiguity: necker cube. Co(cid:374)fusio(cid:374) (cid:271)et(cid:449)ee(cid:374) depi(cid:272)tio(cid:374)s a(cid:374)d depi(cid:272)ted (cid:272)o(cid:374)te(cid:374)ts: (cid:862)this is (cid:374)ot a pipe(cid:863) If a figure is regular in 2d, it is probably regular in 3d. Lights tends to come from above rather than from below. The sun is typically up in the sky. Things tend to be down on the ground rather than floating in the air. Mirror reversal results in changes in: perceived spinning direction, perceived depth, the handedness of the figure, the camera elevation. We tend to see a point light walker facing us rather than walking away.
