The help documentation to the contingencyTableBF() gives this explanation: “the argument priorConcentration indexes the expected deviation from the null hypothesis under the alternative, and correspon...The help documentation to the contingencyTableBF() gives this explanation: “the argument priorConcentration indexes the expected deviation from the null hypothesis under the alternative, and corresponds to Gunel and Dickey’s (1974) a parameter.” As I write this I’m about halfway through the Gunel and Dickey paper, and I agree that setting a=1 is a pretty sensible default choice, since it corresponds to an assumption that you have very little a priori knowledge about the contingency table.
The help documentation to the contingencyTableBF() gives this explanation: “the argument priorConcentration indexes the expected deviation from the null hypothesis under the alternative, and correspon...The help documentation to the contingencyTableBF() gives this explanation: “the argument priorConcentration indexes the expected deviation from the null hypothesis under the alternative, and corresponds to Gunel and Dickey’s (1974) a parameter.” As I write this I’m about halfway through the Gunel and Dickey paper, and I agree that setting a=1 is a pretty sensible default choice, since it corresponds to an assumption that you have very little a priori knowledge about the contingency table.
