Table 1. Percentage of Truth and Lie responses in each condition.

	NO-PRESENCE GROUP			PRESENCE GROUP
	Lie	Truth	p	Lie	Truth	p
REPUTATION RISK	25%	75%	= .01	27%	73%	= .01
NO REPUTATION RISK	30%	70%	<.01	30%	70%	<.01

The null hypothesis in the binomial test is the case in which two categories are equally likely to occur. When this test is statistically significant one category is much likely to occur than the other. Our data show that the truth responses are significantly more likely to occur in all conditions except in Unfavourable Reality i.e. when OPs won and Ss lost. In this case, lie and truth responses were comparable both in the No-Presence Group (p = .12) and in the Presence Group (p = .12).