FIGURE 3.

Classifications between patients and controls combining semantic granularity and ongoing semantic variability features across diverse speech tasks. The Gradient Boosting classifier successfully distinguished (A) ADD patients from HCs, but not (B) PD patients from HCs. The panels show normalized AUC histograms (left inset), average ROC curves (middle inset), and confusion matrices normalized by row and averaged across iterations (right inset). Real results are shown in blue, while results obtained upon shuffling participants’ labels are shown in red. Abbreviations: ADD, Alzheimer's disease dementia; AUC, area under the curve; HCs, healthy controls; PD, Parkinson's disease; ROC, receiver operating characteristic