Table 3.

Response Surface for Within-level Alliance and Subsequent Symptoms

Effect	Coefficient	SE	z	p
a1 (slope along line of congruence)	−0.20	0.05	−4.20	<.001
a2 (curvature along line of congruence)	0.00	0.01	0.10	.92
a3 (slope along line of incongruence)	−0.07	0.07	−1.10	.28
a4 (curvature along line of incongruence)	−0.01	0.01	−1.21	.23

Note. Parameter a1 indicates whether alliance agreement predicts symptoms. Parameter a2 indicates that the strength of the association between agreement and symptoms varies based on whether patients and therapists agree on a stronger or a weaker alliance. Parameter a3 indicates whether the effect of disagreement on symptoms differs between cases where patients rate the alliance as higher and cases where therapists rate the alliance as higher. Parameter a4 indicates whether patient and therapist disagreement on the alliance predicts symptoms.