TABLE 1.

Mean Reaction Times and Error Rates

	Reaction time (ms)		Error rate
Task and condition	Mean	SD	Mean	SD
Localization
Predictive-valid	328	62.0	0.38	0.50
Predictive-invalid	337	66.3	1.00	0.80
Nonpredictive-valid	327	60.0	0.71	1.00
Nonpredictive-invalid	338	69.2	0.83	0.60
Categorization
Predictive-valid	702	95.2	7.90	7.20
Predictive-invalid	715	95.9	7.00	6.90
Nonpredictive-valid	701	91.4	5.80	5.80
Nonpredictive-invalid	712	95.0	8.20	6.90