Table 2 Three statistical indices to compare CAC and RAC curves.

Experiment	Type of curve	Type of response	Accuracy range	z
Pilot	CAC	IDs	0.61–0.95	12.16**
	CAC	Rejections	0.73–0.94	7.92**
	RAC	IDs	0.78–0.93	5.71**
	RAC	Rejections	0.86–0.88	0.77
Experiment 1	CAC	IDs	0.64–0.96	19.99**
	CAC	Rejections	0.77–0.92	9.07**
	RAC	IDs	0.78–0.91	7.24**
	RAC	Rejections	0.83–0.87	1.79
Experiment 2	CAC	IDs	0.66–0.93	12.42**
	CAC	Rejections	0.74–0.81	3.03*
	RAC	IDs	0.74–0.86	4.93**
	RAC	Rejections	0.76–0.77	0.38
Experiment 3	CAC	IDs	0.69–0.93	10.93**
	CAC	Rejections	0.60–0.73	6.44**
	RAC	IDs	0.76–0.79	1.29
	RAC	Rejections	0.64–0.68	2.04*

CAC, confidence-accuracy characteristic; RAC, response time accuracy characteristic; IDs, identifications. *Significant at 0.05 level. **Significant at 0.001 level. z is 2-tailed and based on comparison of the highest and lowest proportions in the accuracy range.

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