Table 3.

External Correlates of model-based and model-free learning

Brief Negative Symptom Scale (BNSS)
Coefficient	Estimate (SE)	p-value
Intercept	1.63 (0.17)	<0.001
Reward	0.61 (0.11)	<0.001
Rarity	0.02 (0.06)	0.67
BNSS	−0.03 (0.01)	0.03
Reward × Rarity	0.12 (0.07)	0.09
Reward × BNSS	−0.007 (0.008)	0.40
Rarity × BNSS	0.0003 (0.004)	0.085
Reward × Rarity × BNSS	0.006 (0.005)	0.24

IQ
Coefficient	Estimate (SE)	p-value
Intercept	1.51 (0.13)	<0.001
Reward	0.50 (0.07)	<0.001
Rarity	0.06 (0.04)	0.10
Group	0.12 (0.11)	0.28
IQ	0.02 (0.009)	0.07
Reward × Rarity	0.25 (0.05)	<0.001
Reward × IQ	0.004 (0.005)	0.49
Rarity × IQ	0.004 (0.003)	0.13
Reward × Rarity × IQ	0.014 (0.004)	<0.001

Snaith-Hamilton Pleasure Scale (Hedonic Capacity)
Coefficient	Estimate (SE)	p-value
Intercept	1.51 (0.13)	<0.001
Reward	0.50 (0.07)	<0.001
Rarity	0.06 (0.04)	0.09
Group	0.12 (0.11)	0.28
SNAITH	0.03 (0.01)	0.09
Reward × Rarity	0.26 (0.06)	<0.001
Reward × SNAITH	0.02 (0.008)	0.03
Rarity × SNAITH	0.003 (0.004)	0.50
Reward × Rarity × SNAITH	0.01 (0.01)	0.11

Note: Coefficients predicting response repetition from the outcome of the previous trial, the transition type, and negative symptoms (BNSS total score), WTAR estimated full scale IQ, and the Snaith-Hamilton Pleasure Scale. Models including Snaith and IQ were tested across both groups. The model including BNSS was included only the SZ group