Table V.
Typical Developmental Self-help Skills of Common Marmoset Monkeys and Humans
| Marmoset Skill | Marmoset Age | Related Human Skill | Human Age |
|---|---|---|---|
| Self-mouthing | 2 wks.1 | Brings hands to mouth | 3 mos.2 |
| Auto-grooming | 2–3 wks.3 | Washes hands with supervision Brushes teeth with supervision |
24–48 mos.4 48–60 mos.4 |
| Brief periods “off” caregiver during which infant explores environment through solitary play* | 2–4 wks.5 | Uses familiar caregiver as secure base from which to explore environment* Once mobile, explores environment but continues to maintain proximity to caregiver* |
3–6 mos.6 12–24 mos.6 |
| Self-calming behavior | 4 wks.1 | Develops strategies to calm self when upset | 3–6 mos.4 |
| Self-feeding* | 4–12 wks.7 | Finger feeding* | 7–9 mos.8 |
| Begins leaving spontaneously due to infant attempts and caregiver rejection* | 5–10 wks.5 | Expression of desire for autonomy* | 24 mos.6 |
| Independent locomotion | 4–12 wks.7 | Efficient crawling on multiple surfaces Walks independently |
10–12 mos.6 13–14 mos.2 |
| Physically quite independent* | 12–16 wks.5 | Well-coordinated, balanced gait enables increasingly independent exploration of environment* | 24 mos.6 |
|
| |||
| Unmatched Developmental Self-help Skills | |||
|
| |||
| Able to capture living prey* | 8–9 wks.3 | NP | -- |
| NR | -- | Refuses excess food | 7 mos.2 |
| NP | -- | Self-spoon feeding begins | 12 mos.9 |
| NP | -- | Cooperates with dressing | 11 mos.2 |
KEY: wks.=weeks; mos.=months; NR = not reported; NP= not present;
*
indicates skill present in multiple tables
REFERENCES: