Extended ROI correlations. 1. The GM volume from the right ROI presented a significant negative correlation with confidence for AD patients and no significant correlations emerged in the bvFTD group. 2. The GM volume of the left and right ROIs negatively correlated with wagering performances in both bvFTD and AD patients. bvFTD: behavioral variant of the frontotemporal dementia, AD: Alzheimer’s disease, GM: grey matter, ROI: region of interest.