Table 2.

Frequency of outcomes and conditional expected posterior probabilities: Single experiments

Treatment	Node x2, right (noncooperation)			Node x6, right (SP)			Node x3, down game 1 or left game 2 (defection)			Node x5, down game 1 (punish)
	n	r	E"(p|r,n)	n	r	E"(p|r,n)	n	r	E"(p|r,n)	n	r	E"(p|r,n)
Single 1	26	13	0.50	13	12	0.867	13	3	0.267	3	1	0.40
Single 2*	26	14	0.536	14	14	0.990	12	6	0.50	NA	NA	NA
Repeat single 1†	24	10	0.423	10	10	0.982	14	5	0.375	5	3	0.571
Single 1 exp‡	17	4	0.263	4	4	0.938	13	5	0.40	5	2	0.429

NA, not applicable. 

^*Note that in game 2, the move order of the outcomes [60, 30] and [50, 50] are reversed relative to game 1. 

^†Data for last trial only for comparability with other single experiments. 

^‡Seventeen of the 24 pairs from repeat single 1 returned for a single play of game 1 with a 20-fold increase in payoffs.