CIS 140 Lecture Notes - Lecture 3: Subjective Constancy, Moon Illusion, Visual Angle
20 Dec 2018
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Document Summary
Trying to measure accuracy- manipulating amount of visual cues. Explain the findings of this experiment in terms of the sun and moon example described in the reading. When unable to perceive distance, we base our judgement on their visual angles- since sun and moon have same visual angle and bc we have no depth info, they look the same size to us. Perception of an objects size stays roughly the same given enough depth info. The reading introduces a mechanism called size-distance scaling. R and d are inversely related assuming s stays constant. The farther away an afterimage appears, the larger it will seem. Relative size (like comparing to a person), depth info on the ground, relationship between objects. When we receive inaccurate info- scientists construct illusions to experiment with. Understand how the mu ller-lyer illusion could be explained as being related to size constancy. Misapplied size constancy scaling- gregory: constancy scaling can be applied wrongly.
