Figure 7.

Dominance of dark stimuli increases with eccentricity in human central vision. a, The ratio of errors at detecting light versus dark stimuli (light/dark ratio of all errors) was significantly correlated with the logarithm of eccentricity at contrasts >6%. The labels at the top report the contrast range (from left to right: 5–20%, 5–6%, 7–9%, and 10–20%), goodness of fit (R²) and probability that the correlation is because of chance. b, Same as a for light/dark ratio of missed targets. c, Same as a for light/dark ratio of reaction time.