Fig. 6.

Comparison of TRs within and between cells. A: neurometric-to-psychometric TRs across the population of neurons (n = 96). Neurons were tested in 2 color directions but only contribute a single TR to the population histogram (the minimum of the 2). TRs were considered undefined (Und) when the NT could not be measured (no points on the neurometric function > 0.8). The triangle represents the geometric mean. B: distributions of TRs for each color direction across neurons that were responsive at PT. The number of neurons measured in each color direction is indicated in parentheses. The total number of cells included in the analysis was 67 (each neuron contributes a TR to 1 cardinal and/or 1 intermediate color direction). C: TRs measured in each neuron's preferred cardinal and intermediate color direction (black: monkey K, gray: monkey S).