Table S1.

Characteristics of the clinical (n = 18) and the control group (n = 16)

Attribute	Clincal group	Control group	P value
Age (y)	21 ± 3	19 ± 2	NS*
IQ	112 ± 16	121 ± 18	NS*
Sex	5 female, 13 male	7 female, 9 male	NS†
Urbanicity	24.4 ± 11.4	32.6.± 8.4	<0.05*
CAARMS visual aberrations	2.0 ± 2.0	0.4 ± 0.9	<0.01‡
CAARMS auditory aberrations	3.1 ± 2.2	0.3 ± 1.1	<0.01‡
CAARMS unusual thought content	2.6 ± 2.1	0 ± 0	<0.01‡
BDI	23.25 ± 11.67	4.83 ± 4.18	<0.01*
STAI	38.1 ± 8.0	29.7 ± 6.3	<0.01*

BDI, Beck Depression Inventory; the number is the mean for the 2 testing days (58); CAARMS, Comprehensive Assessment of At-Risk Mental States, and all CAARMS values are means of maximal symptom intensity (15); NS, not significant; STAI, State-Trait Anxiety Inventory; the number is the mean for the 2 testing days (59).

All data except those for sex show mean ± SD.

^*Welch’s two-sample test.

^†Pearson’s Chi Square test.

^‡Mann-Whitney u test.