A technique was described which allows E to occlude either of S's eyes. This can be accomplished without S's awareness. The basic apparatus consists of two eyepieces with a polaroid filter behind each and a projector with a polaroid filter in front of it. The polaroid filters were positioned so that rotation of the filter in front of the projector resulted in occluded vision for either eye. This technique appears to have application wherever the effect of suggestion on performance of one vs two eyes needs to be controlled.
Get full access to this article
View all access options for this article.
References
1.
SegalS. J.NathanS.The Perky effect: Incorporation of an external stimulus into an imagery experience under placebo and control conditions. Percept. mot. Skills, 1964, 18, 385–394.
2.
TeichnerW. H.KobrickJ. L.DusekE. R.Commonplace viewing and depth discrimination. J. Opt. Soc. Amer., 1953, 45, 913–920.
3.
WoodworthR. S.SchlosbergH.Experimental psychology. New York: Holt, 1954.
