Cite as:
Frost B J, Kaminer J J, 1975, "The orientation anisotropy and orientation constancy: a visual evoked potential study" Perception 4(1) 51 – 58
Download citation data in RIS format

The orientation anisotropy and orientation constancy: a visual evoked potential study

Barrie J Frost, Jehuda J Kaminer

Received 17 September 1974

Abstract. Two experiments were conducted on the orientation anisotropy in which averaged visual evoked potentials (VEPs) were recorded from the occipital scalp. The first experiment confirmed the findings of Maffei and Campbell (1970) that obliquely oriented gratings alternated back and forth produced smaller-amplitude VEPs than when the gratings were oriented horizontally or vertically. Since no asymmetry was found in VEPs produced by a Julesz figure presented under identical conditions, it was concluded that direction of displacement could not have been contributing to the effect. In a second experiment head tilt of the subject was manipulated together with grating orientation and the results indicated that the orientation anisotropy is retinally rather than gravitationally referenced. It was concluded that the site of orientation constancy is located either at higher levels of the primary visual system or in the second visual system.

Restricted material:

 Full-text PDF size: 935 Kb

Your computer (IP address: 50.17.109.248) has not been recognised as being on a network authorised to view the full text or references of this article. This content is part of our deep back archive. If you are a member of a university library that has a subscription to the journal, please contact your serials librarian (subscriptions information).