PSYC 100 Lecture Notes - Lecture 25: Moon Illusion, Retina, Ponzo Illusion

• School: McGill University
• Department: Psychology
• Course: PSYC 100
• Professor: Jens Pruessner

Document Summary

Pictoral depth cues: used by artists (da vinci), they include: Occlusion: a near object blocks an object that is farther away. Relative size: far off objects project a smaller retinal image than close objects do. Familiar size: we know how large familiar objects are, so we can tell how far away they are by the size of their retinal images. Linear perspective: parallel lines appear to converge in the distance. Texture gradient: as a uniformly textured surface recedes, its texture continuously becomes denser. Position relative to horizon: all else being equal, objects below the horizon that appear higher in the visual field are perceived as being farther away. Objects above the horizon that appear lower in the visual field are perceived as being farther away. Mueller-lyer illusion provides a way of answering the question of whether people automatically use pictures" depth cues or whether they learn how to use them.