Table 1.

iBIC and parameter means (SD) for each model (M1–M5) and novel extensions (M6a–M6c) that examined the influence of trial-to-trial EEG theta power

	M1	M2	M3	M4	M5	M6a	M6b	M6c
iBIC	5613	5615	5379	5141	4926	4857	4947	4893
Feedback sensitivity (ρ)	4.05 (2.49)	4.67 (3.25)	4.95 (3.04)
Reward sensitivity (ρ_rew)				12.82 (22.27)	6.78 (4.67)	6.86 (4.35)	7.85 (6.40)	9.81 (8.84)
Punishment sensitivity (ρ_pun)				3.76 (2.83)	4.81 (3.76)	6.26 (5.67)	4.77 (3.62)	9.36 (10.23)
Learning rate (ε)	0.28 (0.18)	0.29 (0.19)	0.29 (0.19)	0.29 (0.17)	0.28 (0.15)	0.23 (0.15)	0.32 (0.13)	0.27 (0.17)
Irreducible noise (ξ)		0.97 (0.02)	0.94 (0.08)	0.97 (0.02)	0.97 (0.01)	0.96 (0.03)	0.99 (0.01)	0.96 (0.03)
Go bias (b)			0.38 (0.62)	0.13 (0.85)	0.50 (0.60)	0.58 (0.61)	0.49 (0.59)	0.58 (0.63)
Pavlovian bias (π)					0.48 (0.77)	0.77 (0.75)	0.34 (0.64)
Effect of theta (β)						−0.67 (0.67)	0.48 (0.73)	−0.32 (0.58)
Trade-off parameter (w)								0.31 (0.14)