Simulated (Bayesian model) and actual psychometric curves for two subjects.

<p>The horizontal axis displays signed contrast (the sign gives the target interval, and the absolute value gives the contrast level). Colour code is the same as in <a href="http://www.ploscompbiol.org/article/info:doi/10.1371/journal.pcbi.1004519#pcbi.1004519.g006" target="_blank">Fig 6</a>: the blue line is the empirically measured psychometric curve; the red line is the Bayesian model’s fitted mean psychometric curve; and the red area represents Bayesian error bars. <b>A</b> One subject from the one-response design. <b>B</b> One subject from the two-response design. As with <a href="http://www.ploscompbiol.org/article/info:doi/10.1371/journal.pcbi.1004519#pcbi.1004519.g006" target="_blank">Fig 6</a>, this plot demonstrates the plausibility of the Bayesian model.