. 2012 Mar 5;367(1589):704–716. doi: 10.1098/rstb.2011.0267

Table 1.

Demographics.

gender^a	total (n = 70)^b: male 49%, female 51%
	scanned (n = 27): male 52%, female 48%
	scanned HP (n = 13): male 10/13^a, female 3/13
	scanned LP (n = 14): male 3/14, female 11/14^a
age (mean ± s.e.)	total: 25.5 ± 0.6 (minimum 18, maximum 49)
	scanned: 25.1 ± 0.7 (minimum 21, maximum 35)
	scanned HP: 24.7 ± 0.7 (minimum 22, maximum 31)
	scanned LP: 25 ± 1 (minimum 21, maximum 35)
ethnicity	total: Caucasian 55%, Asian 25%, Hispanic 12%, African American 8%
	scanned: Caucasian 63%, Asian 11%, Hispanic 11%, African American 15%
	scanned HP (13): Caucasian 46%, Asian 15%, Hispanic 23%, African American 15%
	scanned LP (14): Caucasian 71%, Asian 0%, Hispanic 7%, African American 21%

^aThe distribution of males and females among the high- and low-performing scanned groups is significant, two-tailed p-value = 0.007, Fisher's exact test.

^bThree subjects were excluded from analysis. Two of them had computer technical problems. The third one, who was also scanned, failed to complete the paper and pencil test.