Figure 10.

Bias in the perceived hue of the target ensemble stimulus in Experiment 2 (a) for the green group and (b) for the blue group. Different experimental conditions are plotted on the x-axis and PMF mean is plotted on the left-side y-axis as a measure of perceptual bias. Positive values on the y-axis for conditions across and within always indicate bias toward distractor hues. Right-hand side y-axis shows bias magnitude as a proportion of expected bias if observers averaged all test stimulus elements (both target and distractor). Each set of dots with connecting lines represents one observer. The error bar shows ± 1 SEM around group mean. *p < 0.05.