TABLE 1.
Descriptive statistics of background measures for children with and without dyslexia
| Dyslexia (N = 50) | ||||
|---|---|---|---|---|
| Raw | Standardized | Raw | Standardized | |
| Female: male | 26:24 | 24:26 | ||
| Age | 9;10 (0;9) | N/A | 9;8 (0;10) | N/A |
| SES a | 0.2 (1.2) | N/A | 0.2 (1.1) | N/A |
| Nonverbal reasoning b | 37.2 (6.6) | 55.7 (25.0) | 37.3 (8.1) | 60.1 (28.1) |
| Sustained attention c | 7.0 (2.5) | 7.4 (3.3) | 7.8 (1.8) | 9.1 (3.0) |
SES was determined on the basis of postal codes through the Netherlands Institute for Social Research.
Non‐verbal reasoning was assessed through Raven's Standard Progressive Matrices (Raven & Raven, 2003). Raw and standardized scores on nonverbal reasoning represent the number of items answered correctly out of 60 and percentile scores (norm = 50), respectively.
Sustained attention was measured using the Score! subtest of the Dutch Test of Everyday Attention for Children (Schittekatte, Groenvynck, Fontaine & Dekker 2007). Raw and standardized scores on sustained attention represent the number of items answered correctly out of 10 and norm scores (norm = 10), respectively.