Table 1.
Descriptive participant information by group.
| DD | TA4 | TA2 | ||||
|---|---|---|---|---|---|---|
| M | SD | M | SD | M | SD | |
| N (number of boys) | 19 (6) | 32 (11) | 31 (11) | |||
| Mean age (in years) | 10.52 | 0.46 | 10.54 | 0.38 | 8.79 | 0.29 |
| Mathematics score | 9.95 | 3.95 | 35.41 | 8.68 | 13.03 | 8.74 |
| Reading score* | 8.68 (11) | 1.73 | 14.94 (54) | 4.19 | 7.06 (–)a | 3.80 |
| RPM* | 18.42 (29) | 6.17 | 25.69 (60) | 3.30 | 21.55 (60) | 5.32 |
DD, Children with mathematical difficulties in 4th grade; TA4, Age-matched control group enrolled in 4th grade; TA2, Ability-matched control group enrolled in 2nd grade.
*
Raw scores with mean percentile in brackets.
a
Normative data unavailable.