Table 1. Data summary.

Treatment 1: testing of high cooperation and reversion. Treatment 2 and 3: effect in cooperation by change of pay-off matrix. The matrix changed over the group with same word (A or B).

Treat	Groups	Cooperation	Probability State				Transition Probabilities
			p(T)	p(R)	p(S)	p(p)	p(c|T1)	p(c|R1)	p(c|S1)	p(c|P1)
1	coop	0.86 ± 0.05	0.10	0.76	0.1	0.04	0.76	0.85	0.93	0.87
	no coop	0.36 ± 0.03	0.44	0.38	0.32	0.32	0.25	0.19	0.33	0.23
	reversal	0.87 ± 0.04	0.11	0.77	0.02	0.10	0.86	0.89	1.00	0.82
2	A	0.87 ± 0.04	0.09	0.80	0.03	0.08	0.65	0.90	0.87	0.94
	B	0.64 ± 0.13	0.23	0.34	0.21	0.22	0.47	0.55	0.56	0.65
3	A	0.61 ± 0.10	0.18	0.44	0.21	0.17	0.45	0.64	0.62	0.78
	B	0.71 ± 0.04	0.20	0.51	0.09	0.20	0.62	0.66	0.67	0.66