Systematic distortion of perceived 2D shape during smooth pursuit eye movements.
Even when the retinal image of a static scene is constantly shifting, as occurs when the viewer pursues a small moving object with his or her eyes, the scene is usually correctly perceived to be static. Following early suggestions by von Helmholtz, it is commonly believed that this spatial stability is achieved by combining retinal and extra-retinal signals. Here, we report a perceptually salient 2D shape distortion that can arise during pursuit. We provide evidence that the perceived 2D shape reflects retinal image contents alone, implying that the extra-retinal signal is ignored when judging 2D shape.
Li
Hyung-Chul O
HC
Department of Industrial Psychology, Kwangwoon University, Nowon-Gu, Wolgae-Dong, 447-1, Seoul, South Korea. hyung@daisy.kwangwoon.ac.kr
Brenner
Eli
E
Cornelissen
Frans W
FW
Kim
Eun-Soo
ES
D005556:Form Perception / Q000502:physiology*; D006801:Humans; D010469:Perceptual Distortion / Q000502:physiology*; D011698:Pursuit, Smooth / Q000502:physiology*; D013028:Space Perception / Q000502:physiology*