| Measure | Handwriting quality | Reading (LOP) | Spelling (LOP) | AEAmp (mm) | AEFreq (Hz) |
| Grade 1 | |||||
| Handwriting speed | − | 0.51** | 0.40* | −0.30 | −0.21 |
| Handwriting quality | − | − | − | − | |
| Reading (LOP) | 0.41* | −0.45** | −0.20 | ||
| Spelling (LOP) | −0.47** | −0.06 | |||
| AEAmp (mm) | −0.23 | ||||
| Grade 2 | |||||
| Handwriting speed | −0.14 | 0.24 | 0.56** | −0.08 | 0.01 |
| Handwriting quality | −0.17 | −0.13 | 0.06 | −0.03 | |
| Reading (LOP) | 0.72** | −0.07 | −0.12 | ||
| Spelling (LOP) | −0.01 | −0.30 | |||
| AEAmp (mm) | −0.33 | ||||
| Grade 3 | |||||
| Handwriting speed | 0.10 | 0.39* | 0.37* | 0.08 | −0.28 |
| Handwriting quality | −0.04 | −0.23 | 0.16 | −0.09 | |
| Reading (LOP) | 0.52** | −0.10 | −0.21 | ||
| Spelling (LOP) | −0.11 | −0.06 | |||
| AEAmp (mm) | −0.09 |