PSYCH101 Lecture Notes - Lecture 2: Ponzo Illusion, Retina, Pointillism

• School: University of Waterloo
• Department: Psychology
• Course: PSYCH101
• Professor: Alan Morgan

Document Summary

Different shapes can produce the same retinal projection. The same shape can produce different shaped retinal projections. See the circle when left and right side are the equal distance from you. When you rotate it, it becomes oblong (rotating it in depth), one side becoming farther away and one becoming closer, but you still see the circle. Shape constancy is achieved because we take into account depth information. Ex. that the left side is closer than the right. Even though the box is a 2d image you can t help but think of it as a 3d box, thus you think the dime will fit in it. Don t touch the page, if you manipulate it with your hands the illusion will go away. Were thinking it was a 3d box, and your visual system was thinking of it this way. Applying shape constancy that works in the general world. Ability to see an object as a whole.