Table 2.

Only P3b predicts choices over rounds

${Punish}_{\mathrm{i},\mathrm{t}}~{\mathrm{\beta }}_0+{\mathrm{\beta }}_1{P3b}_{\mathrm{i},\mathrm{t}}+{\mathrm{\beta }}_2{P3a}_{\mathrm{i},\mathrm{t}}+{\mathrm{\beta }}_3{FRN}_{\mathrm{i},\mathrm{t}}+{\beta }_4{P2}_{i,t}+{\beta }_5{Round}_{i,t}+{\beta }_6{P3b}_{i,t}:{Round}_{i,t}+{\beta }_7{P3a}_{i,t}:{Round}_{i,t}+{\beta }_8{FRN}_{i,t}:{Round}_{i,t}+{\beta }_9{P2}_{i,t}:{Round}_{i,t}+\mathrm{\epsilon }$
Variable	Estimate (SE)	z	p	95% Cis
Punish
Intercept	–1.30 (0.30)	–4.38	<0.001	[−1.91, −0.71]
P3b	0.29 (0.09)	3.30	0.001	[0.12, 0.47]
P3a	0.04 (0.14)	0.31	0.76	[−0.23, 0.32]
FRN	0.10 (0.15)	0.65	0.52	[−0.20, 0.39]
P2	–0.04 (0.12)	–0.34	0.74	[−0.28, 0.20]
Round	0.00 (0.03)	0.13	0.90	[−0.05, 0.06]
P3b$\times$Round	–0.07 (0.03)	–2.65	0.008	[−0.12, −0.02]
P3a$\times$Round	–0.02 (0.04)	–0.42	0.68	[−0.09, 0.06]
FRN$\times$Round	0.03 (0.04)	0.74	0.46	[−0.05, 0.12]
P2$\times$Round	–0.03 (0.04)	–0.83	0.41	[−0.10, 0.04]

P2, FRN, P3a, and P3b are all trial-by-trial amplitudes in response to the offer (see Methods). All variables were scaled but not mean-centered. The model includes P2 as a control for the FRN since the FRN is defined as the N2 amplitude. The model includes subject-specific random intercept and slope for P3a. All statistical tests are two-sided with no adjustments for multiple comparisons. The dataset includes 6403 observations from 41 participants.