Table 1.
Characteristics of current sample (DD, controls)
| Characteristic | DD | Controls | F (1,34) | p-value |
|---|---|---|---|---|
| Age (yrs) | 10.6 (1.6) | 9.6 (1.5) | 3.87 | ns (> 0.05) |
| Gender (% female) | 61% | 55% | Χ2 | ns |
| K-BIT IQ (ss) | 91.0 (18.9) | 99.8 (19.5) | 1.8 | ns |
| *WJIII Math Computation (ss) | 84.2 (8.5) | 95.6 (11.2) | 12.3 | .001 |
| *WJIII Math Fact Fluency (ss) | 71.6 (7.3) | 92.2 (9.4) | 53.9 | .000 |
| *Dyscalculia Screener Dot Enumeration (stanine)1 | 3.0 (1.5) | 5.6 (1.7) |
20.3 (df: 1, 32) |
.000 |
| *Dyscalculia Screener Number Comparison (stanine) | 3.8 (1.5) | 5.3 (1.9) |
6.8 (df: 1, 32) |
.01 |
| Dyscalculia Screener Addition (stanine) | 3.3 (1.3) | 3.8 (1.6) | < 1 (df: 1, 32) |
ns |
| Dyscalculia Screener Simple Reaction Time (stanine) | 2.8 (1.2) | 3.9 (1.4) | 6.7 (df: 1, 32) |
.01 |
| WJIII Word Attack (ss) | 99.8 (11.4) | 106.2 (10.5) | 2.7 | ns |
| WJIII Letter-Word Identification (ss) | 95.4 (13.0) | 103.8 (11.1) | 3.9 | ns (> .05) |
| WJIII Reading Fluency (ss) | 94.4 (16.4) | 105.9 (15.4) | 4.5 | ns |
| Conners Parent DSM-IV Inattention (T-score) | 60.9 (10.4) | 58.6 (13.1) | < 1 | ns |
| Conners Parent DSM-IV Hyperactivity/Impulsivity (T-score) | 52.2 (12.4) | 57.2 (12.6) | 1.4 | ns |
| Conners Teacher DSM-IV Inattention (T-score) | 61.1 (6.2) | 55.5 (6.4) | 5.7 | .02 |
| Conners Teacher DSM-IV Hyperactivity/Impulsivity (T-score) | 57.9 (14.3) | 52.4 (9.8) | 1.3 | ns |
| RCMAS Total Anx T-score | 48.0 (11.4) | 42 (10.4) | < 1 | ns |
| Working Memory | ||||
| Cantab Spatial Span For (ss) | 55 (0.8) | 54 (1.0) | < 1 | ns |
| Cantab Spatial Span Back (ss) | 60 (0.7) | 68 (.7) | 2.1 | > .1 |
| Letter Span Forward (raw) | 3.6 (1.1) | 3.4 (.9) | < 1 | ns |
| Letter Span Backward (raw) | 1.6 (0.8) | 1.6 (.8) | < 1 | ns |
* Four tests used to define Dyscalculia, plus IQ and reading in normal range
1Stanine scores: stanine score of 1 = standardized score [SS] < 74; 2 = SS 74-81; 3 = SS 82-88; 4 = SS 89-96; 5 = SS 97-103; 6 = SS 104-111, and so on.