The overall accuracy of DW-NOMINATE to discriminate ternary ideology grades is excellent with \(\text{AUCs}>0.96\) for both cumulative ROC curves. Total Accuracy identified cutpoints at DW-NOMINATE scores of -0.082 (liberal vs. moderate conservative) and 0.42 (liberal moderate vs. conservative) and had excellent sensitivities and specificities >0.91. Parametric cutpoints were at \(0.050 \left[-0.011, 0.12 \right] \text{and}\ 0.44 \left[0.38, 0.49 \right]\) with sensitivities and specificities comparable to those of the Total Accuracy cutpoints.