Table 4.

A comparison of PRC and XPRC at five average precision (AP) levels determined by the PRC algorithm on the CDS dataset. The format of this table is the same as that of Table 3.

Average precision levels		0.0	0.2	0.4	0.6	0.8	1.0
Cumulative article counts		87	363	663	1079	1670	3034
PRC	MAP	0	0.094	0.201	0.325	0.471	0.709
	standard error	0	0.004	0.005	0.006	0.006	0.006
XPRC	MAP	0.103	0.181	0.253	0.317	0.408	0.565
	standard error	0.020	0.011	0.010	0.009	0.008	0.006
p-value		2e-6	3e-12	8e-6	0.446	2e-10	6e-62