Table 1.

Background information of participant.

	SCT training group	SCT no-training group	TD control group
Age	5.86 (1.28)	6.33 (1.27)	5.87 (1.15)
Gender	5 boys, 8 girls	8 boys, 3 girls	9 boys, 9 girls
Parental education	5.58 (1.08)	6.10 (0.83)	5.58 (1.41)
Karyotype	8 XXX, 4 XXY, 1 XYY	3 XXX, 5 XXY, 3 XYY	n.a.
Recruitment strategy*	A:6, B:4, C:3	A:8, B:1, C:2	n.a.

SCT, Sex Chromosome Trisomy; TD, Typically Developing.

^*A = Prospective follow-up, B = Information seeking parents, C = Clinically referred cases.