Table 3 Comparison of impulsivity-related CANTAB variables in the aADHD, BPD, and HC groups

RTI simple error score –

premature responses ¹

M = 0.43

M = 0.30

M = 0.28

aADHD v HC

b = 0.321

0.328

S.D. = 0.728

S.D. = 0.638

S.D. = 0.533

BPD v HC

b = 0.177

0.664

aADHD v BPD

b = 0.144

0.720

RTI five choice error score – premature responses ²

/dichotomized because of skewness/

Percentage of error:

14%

Percentage of error:

6.3%

Percentage of error:

5%

Main effect of group

χ² (2) = 4.836

R² = 1.9–4 0.2%

0.089

aADHD > HC

OR = 3.012

0.045

BPD v HC

OR = 1/0.685

0.599

aADHD v BPD

OR = 2.064

0.255

Stop signal task reaction time (SSRT) ³

(measured in ms)

M = 242.230

S.D. = 42.880

M = 228.147

S.D. = 47.222

M = 219.172

S.D. = 37.778

Main effect of group

F(2,248) = 7.609

< 0.001

aADHD > HC

< 0.001

BPD v HC

> 0.999

aADHD v BPD

0.081

SST Direction error – go trials¹

M = 2.83

M = 1.54

M = 1.31

aADHD > HC

0.019

S.D. = 4.568

S.D. = 2.657

S.D. = 2.509

BPD v HC

0.658

Med: 1.00

Med: 1.00

Med. 0.50

aADHD v BPD

0.139

SST Direction error – stop trials¹

M = 43.17

M = 42.21

M = 41.37

aADHD > HC

< 0.001

S.D. = 4.725

S.D. = 4.080

S.D. = 3.762

BPD v HC

0.076

Med: 43.00

Med: 43.00

Med. 41.00

aADHD v BPD

0.258