Method for inferring distance between items from pairwise logistic regressions, demonstrated using Coltrane’s parameters.

<p><i>A</i>: Estimated probability of a correct response on the last trial of a session (based on the parameters from <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0070285#pone-0070285-g002" target="_blank">Figure 2B</a>) is converted to a -score using the normal inverse cumulative distribution. <i>B</i>: Comparison of relative item positions, based on inferred -scores. Adjacent sitmuli were estimated to be separated by an average of -scores, arrayed along a linear continuum.