Table 2:

Cross-validation estimation for mean (µ) and standard deviation (σ) of MSE for regression models (lower is better). Persona model performs significantly better than the baselines.

	Mean Squared Error
	μ	σ
Therapist-only (unigram)	9.27	7.38
Therapist-only (bigram)	13.09	7.77
Client-only (unigram)	15.40	10.67
Client-only (bigram)	20.69	11.13
Therapist + Client (unigram)	3.04	1.62
Therapist + Client (bigram)	4.32	2.31
Personae (K = 30, P = 30)	0.69	0.51
-Client Only	0.69	0.50
-Therapist Only	0.70	0.54