Table 2. One-sided Wilcoxon test for D ≤ 3 mm. Sample sizes of 1,000 chosen without replacement from each population and P values averaged over 50 trials.

Cingulate area	Class	P value	Class	P value
Left anterior	YC vs. 0.5	0.2118	0 vs. 0.5	0.3769
Left posterior	YC vs. 0.5	0.4365	0 vs. 0.5	0.5971
Right anterior	YC vs. 0.5	0.0693	0 vs. 0.5	0.1219
Right posterior	YC vs. 0.5	0.2923	0 vs. 0.5	0.5837
Left anterior	YC vs. 1	0.0209	0 vs. 1	0.0530
Left posterior	YC vs. 1	0.0048	0 vs. 1	0.0070
Right anterior	YC vs. 1	0.0009	0 vs. 1	0.0156
Right posterior	YC vs. 1	0.0019	0 vs. 1	0.0216