Donnelly M, Miller R J
Department of Psychology, Washington State University, Pullman 99164-4820, USA.
Invest Ophthalmol Vis Sci. 1995 Jul;36(8):1548-54.
An early study claimed that ethanol ingestion can attenuate binocular rivalry and, in some cases, may produce the phenomenal fusion of normally rivalrous stimuli. The current study examined those claims in an experiment incorporating key controls that were lacking in the earlier study.
There were two conditions, one in which observers consumed ethanol and the other in which they consumed a placebo. Observers reported the course of binocular rivalry for several hours after drink consumption using two types of rivalry stimuli, one consisting of a continuously illuminated set of stimuli, the other consisting of dichoptic afterimages.
Ingestion of ethanol resulted in a decrease in rivalry alternation rates, although there was no evidence of phenomenal fusion. Results were essentially identical for both stimulus types.
It is suggested that this effect is not caused by ethanol-induced changes in oculomotor mechanisms but may be caused by ethanol-induced decreases in contrast sensitivity.
一项早期研究称，摄入乙醇可减弱双眼竞争，在某些情况下，可能会使通常相互竞争的刺激产生现象性融合。本研究在一项实验中检验了这些说法，该实验纳入了早期研究中缺乏的关键对照。
有两种情况，一种是观察者摄入乙醇，另一种是他们摄入安慰剂。观察者在饮用饮料后数小时内，使用两种类型的竞争刺激报告双眼竞争的过程，一种由一组持续照明的刺激组成，另一种由双眼分视后像组成。
摄入乙醇导致竞争交替率下降，尽管没有现象性融合的证据。两种刺激类型的结果基本相同。
有人认为，这种效应不是由乙醇引起的动眼机制变化所致，而是可能由乙醇引起的对比敏感度下降所致。
