Monocular and binocular intensity thresholds for fields containing 1-7 dots.

Abstract

"Two subjects reported the number of black dots they saw when plates containing from 1 to 7 dots were presented . . … Each S received 200 trials with each eye and 200 binocularly for each number of dots . . … The percentage of correct reports fell off as a function of the number of dots exposed. The monocular results were in agreement with the curve described by p-super(n), where p was the obtained percentage of correct reports on one dot and n was the number of dots . . … Similarly, expansion of (p + q)-super(n) = 1.00 showed some success in predicting the distribution of incorrect judgments on plates containing 5 and 6 dots . . … These formulations assume independent variability of sensitivity in the various areas of the fovea . . … The binocular results conform roughly to properly compounded monocular probabilities. However, no single binocular formulation seems to fit the results from all subjects and all visual fields." (PsycINFO Database Record (c) 2006 APA, all rights reserved)