Samples of psychometric functions under different conditions in Experiment 1.

<p>The proportion of trials is plotted such that the probe seemed more numerous as a function of the number of test dots. The fitted results from one participant were shown as examples. The vertical dashed lines indicate the PSEs (i.e., the point of subjective equality) of the match, which were clearly higher than the probe number (indicated by the arrow) when adapted under the no-mask (open circles), monoptic-mask (open rectangles), and dichoptic-mask (open triangles) conditions. The PSEs with adaptation were significantly greater than their respective baselines (filled circles=no-mask condition; filled rectangles=monoptic-mask condition; filled triangles=dichoptic-mask condition). Adaptation decreased under the monoptic- and dichoptic-mask conditions compared with adaptation under the no-mask condition.