Fig. 7:

Impact of m on multi-feature regression results: correlation of the predicted PHQ-9 score and the ground-truth PHQ-9 score versus m, i.e., when considering m days of Internet traffic data.

Impact of m on multi-feature regression results: correlation of the predicted PHQ-9 score and the ground-truth PHQ-9 score versus m, i.e., when considering m days of Internet traffic data.