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<p>Contains data and script for the analysis reported in section 'A Critical Test of ROC Symmetry'.</p> <p><code>analysis_Mafc.r</code> contains the code performing the complete analysis using <code>rstanarm</code>. It also calculates the reported Bayes factors. Requires the data in file <code>Mafc_data.txt</code>.</p> <p>The data in the <code>txt</code> file (<code>Mafc_data.txt</code>) is mostly self-explanatory with the following columns: - <code>subj</code>: participant identifier. - <code>ma</code>: number of response options with three levels: "2AFC", "3AFC", and "4AFC". - <code>focus</code>: instruction whether to choose the <code>valid</code> or <code>invalid</code> item among the presented ones. - <code>correct</code>: position of correct item among presented ones (from 1 to $M$, i.e., up to 4). - <code>chosen</code>: position of selected item. - <code>rt</code>: response time in milliseconds. - <code>order_cond</code>: which <code>focus</code> was presented first. - <code>acc</code>: correct = 1, error = 0.</p>
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