Linear Mixed Models.^a

aCells in the table that have bold data presented designate the target results for each variable and interaction, whereas cells with italicized data designate results that are more adequately assessed by a different test presented in the table: Test 1 was designed to investigate the overall effect of gender and autism diagnosis on PC density. It incorporated cerebellar regional volume as a WLS weight to adjust the test's significance relative to the regional volume for each PC density measurement. Test 3 was designed to test the regional differences in PC density as an effect of gender and diagnosis. Tests 2 and 4 are designed to investigate the contribution of fresh brain weight (grams), as a correlate of tissue volume [39], to Tests 1 and 3, respectively. bOne control male case was missing brain weight information.