Summary of the results (optimal parameters and resulting correlation coefficients) of the intersubject models for the different selections of training and test sets for Worry/Fear (Q3).

For NARX models, those were obtained with six different combinations of features: (i) filtered HR (u1), RSP rate (u2) and expiration time (u3), (ii) filtered HR (u1), RSP rate (u2) and inhalation depth (u3), (iii) filtered HR (u1), RSP rate (u2) and exhalation depth (u3), (iv) filtered HR (u1), expiration time (u2) and inhalation depth (u3), (v) filtered HR (u1), expiration time (u2) and exhalation depth (u3), and (vi) filtered HR (u1), inhalation depth (u2) and exhalation depth (u3). For the sliding-window linear regression, the combined features were filtered GSR and GSR derivative.