Accession Number : AD0685480

Title :   PERCEIVED ROTARY MOTION FROM CHANGES IN A STRAIGHT LINE,

Corporate Author : UPPSALA UNIV (SWEDEN) DEPT OF PSYCHOLOGY

Personal Author(s) : Johansson,Gunnar ; Jansson,Gunnar

Report Date : 07 MAY 1968

Pagination or Media Count : 6

Abstract : The problem dealt with was how perception of a three-dimensional space is related to the corresponding two-dimensional retinal image. The stimulation used was a straight line changing length and direction. For this stimulation a geometrical model was developed. The basic decoding principle in this model is that the changes in the two-dimensional figure will be perceived as three-dimensional motions of an object with constant shape and size. This principle was approximately verified for the majority of the data. The main deviation from the model was that there was generally less perceived depth than predicted. Also a second decoding principle was generally verified: rotary, but not translatory motion is perceived from this kind of stimulation. A third unexpected decoding principle was found in the data: the line is perceived in a frontal-parallel direction when it has its maximal extention. (Author)

Descriptors :   (*SPACE PERCEPTION, ROTATION), RETINA, VISION, OPTICAL IMAGES, STIMULATION(PHYSIOLOGY), GEOMETRIC FORMS, DECODING, SWEDEN

Subject Categories : Psychology

Distribution Statement : APPROVED FOR PUBLIC RELEASE