Table 1. Characteristics of the study sample.

	val-met / met-met	val-val	p-value
N	30	46
gender	9 male	13 male	0.87
	21 female	33 female
age in years	23.6 ± 2.5	23.3 ± 3.3	0.62
SPM	104.8 ± 10.5	108.7 ± 10.1	0.12
MWT	110.9 ± 12.3	112.1 ± 13.7	0.69

SPM standard progressive matrices IQ estimate; MWT Mehrfachwahl-Wortschatztest IQ estimate. P-values refer to t-test for age, SPM and MWT and to a Chi-square test for gender.