PSYC 101 Chapter Notes - Chapter 3: Retina, Depth Perception
Document Summary
Had babies crawl across a lat surface and then glass board with a clif below while their mothers called to them on the other side. 27 crawled onto lat surface, and only 3 crawled onto glass. Showed that most infants can discriminate depth as soon as they can crawl, but many of them would have fallen if the glass had not been there. Does not prove percepion and avoidance are innate. When done with animals, their response is characterisic of the normal behavior/developmental rate of that species and is consistent with evoluionary theory. Less that one foot- would cross freely, would not cross if more than one foot. Sense of security/danger depends highly on visual cues. Rats would cross as long as they could feel the glass with whiskers. Rats don"t use visual cues, rely more on touch and smell.
