Table 1.

Raw physiological scores across trials.

	PEP	PEP SD	EDR	EDR SD
Baseline 1	120.43	10.10	4.53	3.83
Trial 1: Reward	120.24	10.21	5.10	3.96
Baseline 2	120.49	10.21	5.00	3.93
Trial 2: Reward	120.76	9.74	5.08	3.94
Baseline 3	120.68	10.07	5.16	4.20
Trial 3: Reward	121.12	10.41	5.52	4.18
Trial 3: Extinction	121.47	9.90	5.51	4.13
Baseline 4	120.32	10.11	5.65	4.28
Trial 4: Reward	121.19	9.82	5.95	4.23
Baseline 5	120.34	10.06	5.81	4.48
Trial 5: Extinction	120.43	9.89	6.29	4.44
Trial 5: Reward	121.58	10.61	6.31	4.45

Note. PEP = Cardiac pre-ejection period, quantified as the period of time in milliseconds between the onset of ventricular depolarization (Q-wave) and the opening of the aortic valve (B point of dZ/dt waveform). EDR = Electrodermal response, scored as the number of non-specific fluctuations in skin conductance exceeding 0.05 μS. SD = standard deviation.