| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0. The child is not able to do up a button | 216 |
85%
|
| 1 | 1. The child does up button, using trial and error, with adult holding one piece | 36 |
14.2%
|
| 2 | 2. The child does up button steadily, smoothly, with adult holding one piece | 2 |
0.8%
|
| 3 | 3. The child can do up a button alone | 0 |
0%
|