Table 1. Choice of strategies in S-soluble and non-S-soluble games: Experiment 1.

Choice of Stackelberg (S) and non-Stackelberg (N) strategies in S-soluble and non-S-soluble games: Experiment 1 (N = 72).

Game	% S	χ2(1)	p<	w	Bias toward
S-soluble
1	88.89	99.18	.005	1.17	S
2	20.83	5.27	.025	0.27	N
3	86.11	89.47	.005	1.11	S
4	39.89	0.93	ns	0.11	S
5	77.78	63.35	.005	0.94	S
6	79.17	67.39	.005	0.97	S
Non-S-soluble
7	47.22	6.06	.025	0.29	S
8	76.39	59.43	.005	0.91	S
9	51.39	10.31	.005	0.38	S
10	62.50	27.14	.005	0.61	S

Notes.

% S = percentage of players choosing Stackelberg strategies. Cohen’s (1992) effect size index w ≥ 0.10 is small, w ≥ 0.30 is medium, w ≥ 0.50 is large.