Table 1. Number of Participants (n), Mean (M), Standard Deviation (Sd) of Participants' Contributions (in dollar cents) and the 95% Confidence Interval (CI) as a Function of Team Member, Contribution Knowledge and Decision Constraint in Experiment 1.

						95% CI of the Mean
Team member	Contribution knowledge	Decision constraint	n	M	Sd	Lower bound	Upper bound
Human	Unknown	Pressure	33	20.76	12.76	16.36	25.15
		Forced Delay	35	17.14	11.65	12.87	21.41
	Known	Pressure	40	21.00	13.83	17.01	24.99
		Forced Delay	39	22.10	13.00	18.06	26.15
Computer	Unknown	Pressure	30	24.07	12.30	19.46	28.68
		Forced Delay	43	22.26	13.52	18.41	26.11
	Known	Pressure	29	22.07	13.13	17.38	26.76
		Forced Delay	37	18.38	11.96	14.23	22.53

Note that the maximum contribution was 40 dollar cents.