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. 2017 Dec 18;7:1296. doi: 10.1038/s41398-017-0040-3

Table 1.

Subject characteristics

Low compulsive group High compulsive group
Age* 21.40 ± 2.52 20.75 ± 2.34 t(38) = .85, p = .403
Gender (f/m)* 13/7 14/6 χ(1) = .114, p = .736
Handedness (r/l) 16/4 16/4 χ(1) = .0, p = 1.00
IQ (WASI total) 115.6 ± 10.9 115.4 ± 9.8 t(38) = .06, p = .952
PI-WSUR total* 5.3 ± 4.0 50.2 ± 18.3 t(38) = 10.74, p < .001
MFQ* 19.1 ± 8.9 19.4 ± 11.7 t(38) = .07, p = .942
RCMAS total* 20.7 ± 10.1 18.7 ± 10.7 t(38) = −.61, p = .545
BDI-II total 6.1 ± 4.2 8.7 ± 7.1 t(38) = 1.41, p = .166
STAI (trait) 38.3 ± 6.5 41.4 ± 11.3 t(38) = 1.05, p = .302
STAI (state) 33.5 ± 6.1 34.0 ± 9.4 t(38) = .20, p = .843
BIS 58.30 ± 6.87 59.04 ± 9.74 t(38) = −.28, p = .782
Intolerance of uncertainty 48.75 ± 15.14 58.80 ± 15.87 t(38) = −2.05, p = .047
FMPS total 98.02 ± 16.21 103.02 ± 17.35 t(38) = −0.94, p = .353

Subjects were recruited from a population-based database so that groups differed maximally on the compulsivity spectrum (PI-WSUR)21, but were matched for age, gender, depression (MFQ)22 and anxiety (RCMAS)24. The groups did not differ in depression (BDI-II)27, anxiety (STAI)26, impulsivity (BIS)28, handedness30 or intellectual abilities (WASI)29, as assessed on the day of the experiment. Groups differed in their intolerance of uncertainty33, but not in perfectionism (FMPS)46. (mean ± SD); *data used for recruiting participants