Retinal sensitivity mapping.

<p>A. Experiment 1. The observer's probability of correctly identify the stimulus configuration (dot-up or dot-down) is plotted as a function of the eccentricity at which the configuration was presented. Data is presented for all five observers. The smooth curve is a maximum likelihood fit of a psychometric function. The observer's probability of correctly identify the stimulus configuration (dot-up or dot-down) is plotted as a function of the stimulus size for stimuli presented at each of three retinal eccentricities. B. Experiment 2. Data is presented for both observers. Observer S04 in Experiment 2 was the same observer as Observer S04 in Experiment 1. See text.