Table 1.

Behavioral and demographic findings

VVSDVMSDMMSDFp
(n = 8)(n = 8)(n = 6)
Age28.177.1133.387.0927.009.621.780.19
Gender (number of males)454χ2 = 0.450.80
Education16.172.7116.752.6016.803.270.090.91
WAIS IQ101.013.6109.414.1103.87.20.810.46
Accuracy
    Numerical size judgement (J)0.9080.0740.9000.1040.9300.0270.370.69
    Numerical computation and J (CJ)0.8670.1130.7560.2470.8500.1411.050.37
    Retrieval and J (E_RJ)0.9330.0610.9690.0530.9200.0760.120.89
    Numerical computation in working memory and J (E_CJ)0.7330.0610.7000.2350.7700.1100.350.71
    Motor task (M)0.9920.0200.9690.0590.9800.0450.280.76
Reaction time (s)
    Numerical size judgement (J)1.3880.2891.4070.2631.3180.1480.650.53
    Numerical computation and J (CJ)1.9830.2561.7950.3761.9080.1130.730.49
    Retrieval and J (E_RJ)1.1520.1911.0910.2041.1300.1560.290.75
    Numerical computation in working memory and J (E_CJ)1.8040.2561.8490.2042.0410.2290.240.79
    Motor task (M)0.9180.2060.9180.1100.9110.1170.170.85
  • There were no significant demographic or performance differences across COMT genotype groups. VV, Val-homozygote; VM, Val-Met hetrozygote; MM, Met-homozygote.