Table S2.

Thirty-six choice pairs used in the fMRI experiment

Pair no.	Option	π1	π2	π3	Total	Min	Gini
1	1	290	500	1,010	1,800	290	0.4
	2	350	380	1,070	1,800	350	0.4
2	1	150	780	870	1,800	150	0.4
	2	50	800	950	1,800	50	0.5
3	1	230	620	950	1,800	230	0.4
	2	200	320	1,280	1,800	200	0.6
4	1	260	560	980	1,800	260	0.4
	2	160	220	1,420	1,800	160	0.7
5	1	350	560	890	1,800	350	0.3
	2	330	810	960	2,100	330	0.3
6	1	360	540	900	1,800	360	0.3
	2	190	880	1,030	2,100	190	0.4
7	1	330	600	870	1,800	330	0.3
	2	150	750	1,200	2,100	150	0.5
8	1	330	600	870	1,800	330	0.3
	2	210	420	1,470	2,100	210	0.6
9	1	400	640	760	1,800	400	0.2
	2	630	660	1,110	2,400	630	0.2
10	1	470	500	830	1,800	470	0.2
	2	460	760	1,180	2,400	460	0.3
11	1	440	560	800	1,800	440	0.2
	2	380	680	1,340	2,400	380	0.4
12	1	440	560	800	1,800	440	0.2
	2	380	440	1,580	2,400	380	0.5
13	1	470	680	1,550	2,700	470	0.4
	2	240	1,140	1,320	2,700	240	0.4
14	1	290	1,040	1,370	2,700	290	0.4
	2	100	1,150	1,450	2,700	100	0.5
15	1	200	1,220	1,280	2,700	200	0.4
	2	210	660	1,830	2,700	210	0.6
16	1	220	1,180	1,300	2,700	220	0.4
	2	40	730	1,930	2,700	40	0.7
17	1	600	690	1,410	2,700	600	0.3
	2	490	1,120	1,390	3,000	490	0.3
18	1	390	1,110	1,200	2,700	390	0.3
	2	280	1,240	1,480	3,000	280	0.4
19	1	480	930	1,290	2,700	480	0.3
	2	130	1,240	1,630	3,000	130	0.5
20	1	480	930	1,290	2,700	480	0.3
	2	390	420	2,190	3,000	390	0.6
21	1	610	940	1,150	2,700	610	0.2
	2	730	1,180	1,390	3,300	730	0.2
22	1	630	900	1,170	2,700	630	0.2
	2	550	1,210	1,540	3,300	550	0.3
23	1	710	740	1,250	2,700	710	0.2
	2	410	1,160	1,730	3,300	410	0.4
24	1	550	1,060	1,090	2,700	550	0.2
	2	10	1,630	1,660	3,300	10	0.5
25	1	250	1,660	1,690	3,600	250	0.4
	2	710	740	2,150	3,600	710	0.4
26	1	600	960	2,040	3,600	600	0.4
	2	580	640	2,380	3,600	580	0.5
27	1	690	780	2,130	3,600	690	0.4
	2	380	680	2,540	3,600	380	0.6
28	1	510	1,140	1,950	3,600	510	0.4
	2	300	480	2,820	3,600	300	0.7
29	1	670	1,180	1,750	3,600	670	0.3
	2	630	1,470	1,800	3,900	630	0.3
30	1	640	1,240	1,720	3,600	640	0.3
	2	270	1,800	1,830	3,900	270	0.4
31	1	790	940	1,870	3,600	790	0.3
	2	590	770	2,540	3,900	590	0.5
32	1	720	1,080	1,800	3,600	720	0.3
	2	510	540	2,850	3,900	510	0.6
33	1	910	1,060	1,630	3,600	910	0.2
	2	1,010	1,340	1,850	4,200	1,010	0.2
34	1	760	1,360	1,480	3,600	760	0.2
	2	660	1,620	1,920	4,200	660	0.3
35	1	870	1,140	1,590	3,600	870	0.2
	2	610	1,300	2,290	4,200	610	0.4
36	1	910	1,060	1,630	3,600	910	0.2
	2	660	780	2,760	4,200	660	0.5

Note: The third through fifth columns indicate amounts (in yen) received by the unknown persons Red, Green, and Blue in the distribution task, and amounts received by the participant if event Red, Green, or Blue occurred (with 1/3 probability each) in the gambling task. The sixth column indicates the total amount, the seventh column indicates the minimum amount, and the last column indicates the Gini coefficient for each option. The order of the two options in each pair and the order of the 36 pairs were randomized across participants and the two tasks, and did not follow the order of entries in the table. None of Pearson’s correlations between the key task parameters was significant (r_{ΔTotal, ΔMin} = 0.06, P = 0.74; r_{ΔTotal, ΔGini} = 0.00, P = 1.00; r_{ΔMin, ΔGini} = 0.17, P = 0.32).