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Mean percentage of errors (and SE) of 3rd and 5th grade children in reading and spelling experimental words.
| Reading | Spelling | |||||
|---|---|---|---|---|---|---|
| HD | LD | ND | HD | LD | ND | |
| 3rd grade | 5.6 (2.0) | 20.2 (4.9) | 14.6 (4.0) | 5 (1.8) | 9.3 (2.8) | 8.5 (2.7) |
| 5th grade | 1.8 (0.9) | 21.1 (5.0) | 8.3 (2.6) | 2.3 (1.1) | 1.1 (0.7) | 5.6 (2.0) |
Note: HD = words with high frequency roots and suffixes; LD = words with low frequency roots and suffixes; ND = non-derived words.
