Table 1.

Efficiency as a function of the number of dots for three subjects

	Efficiency (%)
	2 dots	4 dots	8 dots	16 dots	32 dots
SWW	88.21	86.75	81.89	75.16	72.18
SGF	82.36	83.96	83.37	75.41	71.41
DS	85.45	84.81	81.23	74.27	73.51

Efficiency is defined as the number of target hits achieved by the subject divided by the number that would be scored, on average, by an ideal performance model that used the optimal strategy and was hampered only by the widths of the prior probability distribution and the normalized likelihood function. All efficiency values are significantly less than 100%.