Table 1.
Means, standard deviations, and reliability estimates of the measures in Study 1.
| Tests/Scores | M | SD | rtt | |
|---|---|---|---|---|
| Speed in the Sub-Components | ||||
| Inspection Time (perception) | 63.1 a | 25.4 | - | |
| Reaction Time modified d2 (simple mental operation) | 1321.5 a | 349.3 | .89 c/.99 d | |
| Simple Reaction Time (motor reaction) | 242.8 a | 30.7 | .55 c/.60 d | |
| Response-Stimulus Interval modified d2 (item shifting) | 614.5 a | 50.9 | .41 c/.51 d | |
| Sustained Attention Tests | ||||
| Figural (d2-R electronic version) | 222.4 b | 40.2 | .98 d | |
| Numerical (Revision Test) | 388.1 b | 66.7 | .96 d | |
| Verbal (BIS UW/CW/PW) | 31.0/22.7/12.6 b | 7.1/6.3/2.7 | .96/.93/.80 d | |
| Reasoning Tests | ||||
| Figural (matrices, I-S-T 2000 R) | 10.5 b | 3.0 | .61 d | |
| Numerical (number series, I-S-T 2000 R) | 13.2 b | 5.1 | .90 d | |
| Verbal (verbal analogies, I-S-T 2000 R) | 11.5 b | 2.9 | .61 d | |
| Working Memory Span Tasks | ||||
| Figural (symmetry span) | 15.3 b | 4.2 | .56 d | |
| Numerical (operation span) | 24.0 b | 5.9 | .74 d | |
| Verbal (reading span) | 21.1 b | 5.8 | .67 d | |
Notes: a Average speed in ms, b Number of correct items (minus confusion errors for sustained attention tests), c Retest reliability, d Cronbach’s α.