Table 1. Location of the median target-absent RT on the target-present RT distribution.

The values in this table are obtained by finding the percentile on the target present distribution that corresponds to the median target absent RT for the conjunction task. Mean percentile, standard deviations, and confidence intervals are derived from the data of all observers. Average miss errors are tabulated in the bottom row.

	Set size 3	Set size 6	Set size 12	Set size 18
Mean percentile	70.05	76.83	82.03	82.67
Std. Deviation	9.928	7.448	7.174	8.863
Std. Error	3.139	2.355	2.269	2.803
Lower 95% CI of mean	62.95	71.50	76.90	76.33
Upper 95% CI of mean	77.15	82.16	87.16	89.01
Miss Errors	2.2%	2.5%	3.0%	4.9%