Table 4. Measures of Task Performance.
| ADHD R− | ADHD R+ | CON R− | CON R+ | Diagnostic Group | Reward | Diagnostic Group × Reward | |
| (n = 18) | (n = 20) | (n = 20) | (n = 20) | ||||
| M (SD) | M (SD) | M (SD) | M (SD) | F | |||
| SST | |||||||
| MDRT | 448.66 (97.39) | 436.38 (103.89) | 438.15 (78.59) | 422.85 (82.32) | 0.00 | 0.62 | 0.00 |
| SDRT | 126.28 (44.19) | 113.44 (45.00) | 118.09 (75.86) | 95.06 (28.91) | 0.62 | 2.35 | 0.15 |
| SSRT | 282.12 (107.81) | 265.48 (115.33) | 239.61 (66.83) | 247.27 (57.42) | 1.03 | 0.09 | 0.40 |
| Hits | 57.44 (28.04) | 57.33 (31.83) | 67.42 (38.23) | 54.44 (35.39) | 0.43 | 0.77 | 0.61 |
| OE | 13.56 (17.84) | 11.28 (11.42) | 5.58 (9.14) | 5.44 (4.08) | 7.39** | 0.14 | 0.12 |
| n-back | |||||||
| RT | 726.74 (215.06) | 735.50 (195.92) | 596.70 (170.42) | 689.83 (162.75) | 1.37 | 0.42 | 0.88 |
| d′ | 2.97 (0.52) | 3.19 (0.61) | 3.75 (0.44) | 3.60 (0.48) | 20.04*** | 0.92 | 1.75 |
| CPT | |||||||
| FP | 1.28 (1.49) | 0.70 (0.92) | 0.26 (0.55) | 0.85 (1.23) | 2.96 | 0.00 | 5.40* |
| OE | 6.94 (15.66) | 1.30 (1.49) | 0.50 (1.00) | 0.63 (0.67) | 3.00 | 2.76 | 2.95 |
| MDRT | 304.45 (86.41) | 385.56 (150.78) | 336.17 (56.66) | 325.66 (36.80) | 0.00 | 2.26 | 4.38* |
| SDRT | 90.48 (67.62) | 97.24 (59.02) | 69.24 (43.65) | 56.26 (21.56) | 5.30* | 0.12 | 0.66 |
| Time Discrimination | |||||||
| ST | 217.08 (61.88) | 192.38 (57.33) | 229.00 (213.02) | 168.88 (62.78) | 0.04 | 2.38 | 0.42 |
| MRT | 860.52 (260.44) | 703.29 (258.78) | 850.03 (328.68) | 682.79 (246.56) | 0.98 | 7.72** | 0.00 |
| SDRT | 801.39 (424.80) | 528.04 (249.06) | 885.39 (545.81) | 545.75 (330.78) | 0.57 | 11.57*** | 0.10 |
| Time Reproduction | |||||||
| ERR | 3394.93 | 2651.88 | 1587.36 | 2092.64 | 14.66*** | 0.08 | 3.56 |
| (1653.16) | (1796.32) | (675.55) | (1222.55) | ||||
| AS | 0.96 (0.08) | 0.94 (0.09) | 1.00 (0.07) | 0.95 (0.05) | 2.77 | 4.81* | 0.78 |
| Delay Aversion | |||||||
| DUR | 55.46 (25.07) | 70.24 (22.92) | 76.00 (25.84) | 97.14 (33.65) | 10.73** | 8.92** | 0.20 |
ADHD, ADHD group; CON, control group. R−, no financial reward; R+, financial reward. Diagnostic Group, main effect of diagnostic group; Reward, main effect of reward condition; Diagnostic Group × Reward, interaction effect of diagnostic group and reward condition. n, number of subjects; M, median; SD, standard deviation. SST, stop-signal task, n-back, n-back task, CPT, continuous performance task; MDRT, median reaction time in the “go”-trials (SST); SDRT, reaction time variability in the “go”-trials (SST); SSRT, stop-signal reaction time (SST); Hits, number of correct inhibitions (SST); OE, omission errors (SST); RT, reaction time for correctly identified targets in milliseconds (n-back); d′, performance accuracy (n-back); FP, false positives (CPT); MDRT, median reaction time for correctly identified targets in milliseconds (CPT); SDRT, standard deviation of reaction time for correctly identified targets in milliseconds (CPT); ST, sensitivity threshold in milliseconds (Time Discrimination); ERR, absolute value of the deviation between specified and produced time interval in milliseconds (Time Reproduction); AS, Accuracy Score (Time Reproduction); DUR, mean trial duration in seconds (Delay Aversion). F, F-value.*p<0.05; **p<0.01; ***p<0.001.