Table 1.
Response of each child in baseline and experimental phases. M, male; F, female (with age in months). (1), probed but used hand to open the lid, with no levering; (2), slid panel open but failed to insert stick tool in hole to push the bolt.
| child | baseline | phase 1 dip model | phase 2 probe + lever model |
|---|---|---|---|
| M36 | no dip | dip × 3 | probe + open (1) |
| M38 | no dip | dip × 3 | probe + lever |
| F39 | no dip | dip × 3 | attempt (2) |
| M40 | no dip | dip × 3 | dip × 3 |
| F42 | no dip | dip × 3 | attempt (2) |
| F42 | no dip | dip × 3 | probe + lever |
| F44 | no dip | dip × 3 | probe + lever |
| M45 | dip × 3 | — | probe + lever |
| F47 | no dip | dip × 3 | probe + lever |
| F50 | no dip | dip × 3 | probe + lever |
| F50 | no dip | dip × 3 | probe + lever |
| F55 | no dip | dip × 3 | attempt (2) |