Table 1.
Comparison of impulsivity scores between male (N=25) and female (N=25) groups. Mean, standard deviation (SD), t-value and p-value are shown.
| Variables | Male | Female | t | p | ||
|---|---|---|---|---|---|---|
| Mean | SD | Mean | SD | |||
| BIS Total score | 60.00 | 11.46 | 59.28 | 9.34 | 0.24 | 0.8102 |
| BIS Non-planning | 22.04 | 4.20 | 21.84 | 4.45 | 0.16 | 0.8712 |
| BIS Motor Impulsivity | 23.42 | 7.44 | 22.28 | 4.43 | 0.65 | 0.5171 |
| BIS Cognitive Impulsivity | 14.54 | 3.11 | 15.28 | 3.40 | -0.79 | 0.4318 |
| Number of Impulsive Responses-1 (IR-1) | 38.44 | 3.54 | 36.24 | 4.99 | 1.80 | 0.0785 |
| Number of Impulsive Responses-2 (IR-2) | 18.88 | 5.75 | 17.56 | 4.70 | 0.89 | 0.3788 |
| SF for 50 after a losing trend of previous 2 trials | 30.96 | 8.42 | 28.16 | 6.67 | 1.30 | 0.1988 |
| SF for 10 after a losing trend of previous 2 trials | 27.16 | 6.77 | 26.12 | 7.95 | 0.50 | 0.6207 |
| SF for 50 after a gaining trend of previous 2 trials | 49.52 | 12.10 | 50.36 | 8.25 | -0.29 | 0.7755 |
| SF for 10 after a gaining trend of previous 2 trials | 49.04 | 13.04 | 46.20 | 7.34 | 0.95 | 0.3474 |
| SF for 50 after a losing trend of previous 3 trials | 38.12 | 11.00 | 36.80 | 7.38 | 0.50 | 0.6205 |
| SF for 10 after a losing trend of previous 3 trials | 37.12 | 10.22 | 34.64 | 11.15 | 0.82 | 0.4164 |
| SF for 50 after a gaining trend of previous 3 trials | 41.84 | 8.51 | 41.20 | 6.60 | 0.30 | 0.7676 |
| SF for 10 after a gaining trend of previous 3 trials | 38.60 | 11.29 | 37.20 | 6.94 | 0.53 | 0.5997 |
| SF for 50 after a losing trend of previous 4 trials | 32.80 | 9.61 | 31.84 | 6.72 | 0.41 | 0.6840 |
| SF for 10 after a losing trend of previous 4 trials | 31.08 | 8.84 | 27.40 | 9.79 | 1.40 | 0.1695 |
| SF for 50 after a gaining trend of previous 4 trials | 46.68 | 11.14 | 45.76 | 8.01 | 0.34 | 0.7388 |
| SF for 10 after a gaining trend of previous 4 trials | 44.12 | 13.44 | 43.84 | 8.23 | 0.09 | 0.9296 |
| RT following −50 trials | 334.74 | 89.16 | 369.45 | 84.39 | -1.41 | 0.1638 |
| RT following −10 trials | 327.93 | 79.02 | 379.23 | 82.40 | -2.25 | 0.0293β |
| RT following +50 trials | 338.77 | 80.87 | 373.80 | 79.52 | -1.54 | 0.1291 |
| RT following +10 trials | 339.27 | 73.53 | 371.63 | 75.55 | -1.54 | 0.1314 |
| RT following loss trials (−50 and −10) | 332.37 | 82.35 | 375.38 | 80.32 | -1.87 | 0.0677 |
| RT following gain trials (+50 and +10) | 338.38 | 75.57 | 372.65 | 76.76 | -1.59 | 0.1183 |
| RT for trials of higher amount (−50 and +50) | 336.17 | 83.26 | 372.16 | 80.71 | -1.55 | 0.1273 |
| RT for trials of lower amount (−10 and +10) | 333.78 | 75.40 | 375.91 | 77.12 | -1.95 | 0.0567 |
| RT for Impulsive Responses-1 (IR-1) | 336.58 | 79.82 | 380.46 | 104.21 | -1.67 | 0.1012 |
| RT for Impulsive Responses-2 (IR-2) | 341.78 | 77.79 | 381.55 | 84.56 | -1.73 | 0.0899 |
β
The significance was lost after Bonferronni correction for multiple testing; BIS, Barratt Impulsivity Scale; IR-1, Impulsive response-1 (selecting 50 after a single event of loss); IR-2, Impulsive response-1 (selecting 50 after two consecutive events of loss); RT, Reaction time; SF, Selection frequency (refers to the number of times a particular amount was selected)