Table 1.
Task | N | Mean | SD | Min | Max | Skew | Kurtosis |
---|---|---|---|---|---|---|---|
IQ tests | |||||||
Matrix/Block | 106 | 11.64 | 2.81 | 2.00 | 18.00 | −.36 | 1.16 |
Vocabularya | 106 | 3.44 | .40 | 2.24 | 4.36 | −.18 | .26 |
Similaritiesa | 106 | 3.44 | .41 | 2.45 | 4.36 | .15 | −.38 |
EF tasks | |||||||
Stop signal RTc | 106 | 5.47 | .24 | 4.55 | 6.13 | .06 | 2.10 |
Stroop | 106 | 9.64 | 8.36 | −11.39 | 35.81 | .24 | .91 |
Trails B – A | 106 | 28.39 | 14.73 | −8.00 | 80.69 | .61 | 1.78 |
Perseveration errorsb | 106 | .17 | .06 | .05 | .33 | .20 | .09 |
Clinical measures | |||||||
Hyperactiv/Impulsivc | 106 | 3.88 | .14 | 3.58 | 4.28 | .44 | .67 |
Disfluencies | |||||||
Unfilled pausesd | 106 | 10.31 | 14.27 | −23 | 44.41 | −.29 | .20 |
Filled pausesd | 106 | −14.47 | 10.81 | −23 | 12.64 | .74 | −.90 |
Repetitionsd | 106 | −14.97 | 9.55 | −23 | 3.65 | .50 | −1.43 |
Repairsd | 106 | −5.90 | 13.18 | −23 | 22.38 | .12 | −.81 |
Note.
square root transformation,
inverse transformation,
logarithm transformation, and
rationalized arcsine transformation (Studebaker, 1985).