PSY-3215 Lecture Notes - Lecture 21: Retina, Absolute Threshold, Horopter
Document Summary
Black background, little white dot move the dot from left to right. Absolute threshold is generally about per second. Set of vertical bars, little dot move the dot from left to right. Absolute threshold is generally about 1/60 per second. Ten times more sensitive to motion on a filled background than motion on a blank background. The object will move from point a to point b. One person viewing from the front of the room. One person viewing from the back of the room. Physically the object moves one distance (~3 feet) For the person in the front, the image travels a longer distance on the retina in the same amount of time as the person in the back the retinal image is traveling faster. The speed of the retinal image depends on the person"s distance from the object. Speed constancy: judgement of the speed of a moving object is independent of the distance from the object.
