Citation

Garvey CR. J. Exp. Psychol. 1933; 16(1): 83-97.

Copyright

(Copyright © 1933, American Psychological Association)

DOI

10.1037/h0070024

PMID

unavailable

Abstract

Two stimuli were designed for the purpose of casting light upon two mutually exclusive areas of the optic disk. This method of stimulation would favor form discrimination if the optic disk is sensitive to light. It would not favor form discrimination if the latter is dependent upon the retinal elements surrounding the optic disk, as both stimuli irradiate light in all directions in the same manner. There were some small differences between the stimuli in size, brightness, and definiteness. The direction of the differences is opposed to what would be expected on the basis of the sensitive-disk theory. The stimuli were not discriminated on the basis of form, and could not be identified and recognized when shown to the subjects in direct vision after having been presented to the blind spot. The sensitivity of the optic disk is not sufficient or necessary to account for what vision there is of objects in the blind spot. (PsycINFO Database Record (c) 2012 APA, all rights reserved)