PSYC 221 Lecture Notes - Lecture 4: Outline Of Object Recognition, Necker Cube, Stereopsis

• School: Simon Fraser University
• Department: Psychology
• Course: PSYC 221
• Professor: Richard Wright

Document Summary

We need perception to be fast and effortless. Initial stages of object perception are bottom up. Perception due to assembly of very basic parts. Artist have been using depth cues for centuries. The info about the object the person is looking that"s focused on the retina. But when familiar size fails as a depth cue. Closer to horizon = looks 30% larger, because it looks larger than the other depth cues. How fuzzy something is makes it seem further away. Everything beyond a point looks like it"s going in the same direction, everything before the point looks like it"s going the opposite direction. Each eye has a slightly different view, and image is merged. Predatory animals have eyes on each side so they can see behind them for predators. 2% of the population have only monocular vision. They provide an accurate perception of the world most of the time. When perceptions are not accurate, we perceive illusions.