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