Table 4.

Stimuli in the supplementary experiment with 36 trials

Condition	Absolute NPI	P1–P7’s choices (box)		P8’s private signal (ball)
Incongruent (NPI < 0)	5	Anterior	A-B-A-A-A-A-A	b
			B-A-B-B-B-B-B	a
		Middle	A-A-B-A-A-A-A	b
			B-B-A-B-B-B-B	a
		Posterior	A-A-A-A-A-B-A	b
			B-B-B-B-B-A-B	a
	3	Anterior	B-A-A-B-A-A-A	b
			A-B-B-A-B-B-B	a
		Middle	A-A-B-B-A-A-A	b
			B-B-A-A-B-B-B	a
		Posterior	A-A-A-A-B-B-A	b
			B-B-B-B-A-A-B	a
	1	Anterior	B-A-B-B-A-A-A	b
			A-B-A-A-B-B-B	a
		Middle	B-A-A-B-B-A-A	b
			A-B-B-A-A-B-B	a
		Posterior	B-A-A-A-B-B-A	b
			A-B-B-B-A-A-B	a
Congruent (NPI > 0)	5	Anterior	A-B-A-A-A-A-A	a
			B-A-B-B-B-B-B	b
		Middle	A-A-B-A-A-A-A	a
			B-B-A-B-B-B-B	b
		Posterior	A-A-A-A-A-B-A	a
			B-B-B-B-B-A-B	b
	3	Anterior	B-A-A-B-A-A-A	a
			A-B-B-A-B-B-B	b
		Middle	A-A-B-B-A-A-A	a
			B-B-A-A-B-B-B	b
		Posterior	A-A-A-A-B-B-A	a
			B-B-B-B-A-A-B	b
	1	Anterior	B-A-B-B-A-A-A	a
			A-B-A-A-B-B-B	b
		Middle	B-A-A-B-B-A-A	a
			A-B-B-A-A-B-B	b
		Posterior	B-A-A-A-B-B-A	a
			A-B-B-B-A-A-B	b