Mean decision samples against number of choices for a range of pdfs, parameter sets, and mechanisms.

<p>Each panel shows mean decision sample as a function of the number of choices for a range of pdfs (see legend) and for the two alternative mechanisms: s-MSPRT (solid lines) and u-MSPRT (solid circles). Panels a and b are for the parameter sets Ω_<i>IV</i> and Ω_<i>FV</i> respectively (see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0124787#sec019" target="_blank">Methods</a>). In the case of Ω_<i>FV</i>, the gamma and exponential distributions are identical and so not reported separately. All data points are the mean of 950 correct, out of 1000 total trials (see text for inverse gamma based s-MSPRT). Error bars are omitted for clarity and are small; the standard error of the mean is typically 2% of the mean.