Table 4. Scores on the Barratt Impulsiveness Scale Version 11 (BIS-11) in adult and younger male XLI samples, and normative samples.
| Adult males with XLI (n = 47) | Normative adult male sample (n = 393, [24]) | Statistical comparison | Younger males with XLI (n = 17) | Normative adult male sample (n = 147, [25]) | Statistical comparison | |
|---|---|---|---|---|---|---|
| Total score | 68.8±2.8 | 62.8±0.5 | t[50] = 2.86, p<0.01 | 81.8±4.1 | 66.0±0.7 | t[17] = 3.85, p<0.005 |
| Attentional impulsivity | 18.9±0.7 | 16.8±0.2 | t[53] = 2.87, p<0.01 | 21.3±1.5 | 17.4±0.3 | t[17] = 2.60, p<0.05 |
| Motor impulsivity | 23.6±0.7 | 22.4±0.2 | t[51] = 1.57, p = 0.12 | 26.7±1.2 | 21.2±0.3 | t[17] = 4.44, p<0.0005 |
| Non-planning impulsivity | 26.3±1.0 | 23.6±0.2 | t[50] = 2.68, p<0.01 | 33.7±1.6 | 27.5±0.4 | t[17] = 3.83, p<0.005 |
| Attention | 11.8±0.5 | 10.3±0.1 | t[54] = 2.95, p<0.005 | 14.3±1.1 | - | - |
| Cognitive instability | 7.1±0.3 | 6.4±0.1 | t[52] = 1.95, p = 0.06 | 8 (95%CI: 6–9) | - | - |
| Motor | 15.0±0.6 | 15.2±0.1 | t[51] = -0.26, p = 0.80 | 17.6±0.9 | - | - |
| Perseverance | 8 (95%CI: 8–10) | 7.2±0.1 | t[54] = 4.11, p = 0.0001 | 9.1±0.5 | - | - |
| Self-control | 13.8±0.6 | 12.4±0.2 | t[51] = 2.14, p<0.05 | 19.3±0.9 | - | - |
| Cognitive complexity | 12.5±0.5 | 11.3±0.1 | t[51] = 2.40, p = 0.02 | 14.5±0.8 | - | - |