Table 5.

Hierarchical linear regressions predicting Hamilton Depression Rating Scale pre- to post-change by positive emotion indices.

Pred./Outcome	Hamilton Depression Rating Scale
	β	SE	t	p	${\eta }_p^2$
Model 1				R2:	0.45
PED	0.06	0.14	0.44	0.661	0.01
Pre-Tx Sym.	−0.68	0.14	−4.91	<0.001	0.45
Model 2				R2:	0.49
PED	0.03	0.14	0.23	0.816	0.00
Mean PE	−0.20	0.14	−1.46	0.155	0.07
Pre-Tx Sym.	−0.69	0.14	−5.11	<0.001	0.48
Model 3				R2:	0.54
PED	−0.04	0.14	−0.28	0.783	0.00
Mean PE	−0.16	0.13	−1.18	0.248	0.05
PEV	−0.24	0.14	−1.72	0.097	0.10
Pre-Tx Sym.	−0.63	0.14	−4.66	<0.001	0.45

Pred., predictor; PED, positive emotion differentiation; Pre-Tx Sym., pre-therapy symptoms; PEV, positive emotion variability; and PE, positive emotion.