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Mean hue is significantly redder for each subject when viewing foveally presented (1° for subject 5) 580 nm stimuli with red fixation targets (reddish points) than with white fixation targets (black points). Points are labeled with subject number and represent the average of seen stimuli (Table 1), error bars are plus or minus 1 standard error. Note that only the central portion of the Uniform Appearance Diagram is shown.
