| Value | Category | Cases | |
|---|---|---|---|
| 0 | Incorrect | 648 |
11%
|
| 1 | Child correctly writes the problem and writes NINE [9] as answer | 597 |
10.1%
|
| Sysmiss | 4622 |
78.4%
|
|
| r | 26 |
0.4%
|