PSYC 303 Study Guide - Final Guide: Subjective Constancy, Ponzo Illusion, Illuminance

• School: Simon Fraser University
• Department: Psychology
• Course: PSYC 303
• Professor: Thomas Spalek

Document Summary

Human vision tends to ignore low-probability coincidences and focuses on interpretations that assume edge relations are generally true and would hold when object is viewed from variety of angles and positions. Our perceptions of objects and scenes do not vary nearly as much as the fluctuations in the images of those same objects and scenes. Size constancy: ability to see an object as being the same size despite changes in objective distance and retinal image size, leads us to think some objects in distance are larger, ponzo illusion. Two converging lines are automatically interpreted as cues to distance top line is seen as longer. Mueller-lyer illusion: a seems shorter than b. Moon on horizon appears bigger than moon in the sky. Shape constancy: perception of the enduring shape of an object despite wide variation in the shape projected to our eyes. If we push a door outward it is no longer a rectangle but we recognize it as such.