Table 3.
Group Means and Standard Deviations on Personality, Cognitive, and Delay Discounting (k) Measures.
| Controls N = 98 |
CCD N = 58 |
AD N = 121 |
ADCCD N = 116 |
|||||
|---|---|---|---|---|---|---|---|---|
| Mean | (SD) | Mean | (SD) | Mean | (SD) | Mean | (SD) | |
| Impulsivity a,b | 7.0 | (4.2) | 9.7 | (4.5) | 11.0 | (4.2) | 12.7 | (3.8) |
| Harm Avoidance b,c | 16.3 | (6.5) | 15.0 | (6.6) | 14.4 | (5.6) | 13.3 | (6.2) |
| Intelligence a,b | 108.9 | (8.7) | 105.9 | (9.4) | 106.0 | (7.3) | 102.5 | (12.2) |
| Word Span a,b |
45.8 | (10.8) | 42.1 | (12.1) | 41.1 | (10.8) | 38.6 | (12.9) |
| Delay Discounting Rate (k) |
0.0084 | (0.015) | 0.0143 | (0.024) | 0.0115 | (0.018) | 0.0195 | (0.031) |
Note: Impulsivity = Impulsivity scale from the Eysenck Impulsivity – Venturesomeness questionnaire; harm avoidance = Multidimensional Personality Questionnaire harm avoidance scale; intelligence = Shipley Institute of Living Scale estimates of IQ; word span = Operation-Word span test; rate k is the estimated delay discounting parameter.
a
Significant main effect of CCD, p < .05.
b
Significant main effect of AD, p < .05.
c
Significant CCD × AD interaction, p < .05.