History of Movement and Developmental Patterns
Developmental Patterns
| YEAR | ABILITY | SPECIFIC AGE | SOURCE OF DATA |
|---|---|---|---|
| 0 – 1 | Rolls from back to side | 5 months/20 weeks | Bayley (1935) / Gesell et at. (1950) |
| Rolls from back to stomach | 7 months/29 weeks | Bayley (1935) / Shirley (1931) | |
| Grasps with forefinger | 36 weeks | Halverson (1931) | |
| Crawls | 34 weeks | Ames (1937) | |
| Begin advertent release of objects | 44 weeks | Gesell et at. (1950) | |
| Grasps with forefinger and thumb | 52 weeks | Halverson (1931) | |
| Shows considerable proficiency in dropping objects | 52 weeks | Gesell et at. (1950) | |
| 1 – 2 | Stands alone | 62 weeks | Shirley (1931)Bayley(1935) |
| Walks alone | 12.1 months/64 weeks/13 months | Frankenburg and Dodds (1967) / Shirley (1931) | |
| Grasps with approximately adult ability | 14 months | Bayley (1935) / Halverson (1931) | |
| Walks sideways | 16.5 months | Bayley (1935) | |
| Walks backwards | 16.9 months | Bayley (1935) | |
| Throws from erect standing position | 18 months | Gesell et at. (1950) | |
| 2 – 3 | Jumps down from a 12 inch elevation with one foot leading | 27 months | Wellman (1937) |
| Jumps off the floor with both feet | 28 months | Bayley (1935) | |
| Balances on one foot | 29 months / 30 months | Bayley (1935) / Gesell et at. (1950) | |
| Takes short running steps on toes | 30 months | Gesell et at. (1950) | |
| Throws a 9.5 inch or 16.25 inch ball 4 to 5 feet | 30 months | Wellman (1937) | |
| Walks on tiptoe | 30.1 months | Bayley (1935) | |
| Jumps down from 18 inch elevation with one foot leading | 31 months | Wellman (1937) | |
| Stands on walking board 6 cm wide | 31 months | Bayley (1935) | |
| Attempts to step while on walking board | 32.8 months | Bayley (1935) | |
| Catches a 16.25 inch ball with arms straight | 34 months | Wellman and McCaskill (1938) | |
| 3 – 4 | Jumps down from 8 inch elevation with both feet together | 36 months | Wellman (1937) / Gesell et at. (1950) |
| Hops on one foot | 3.4 years | Frankenburg and Dodds (1967) | |
| Jumps over a rope less than 20 cm high | 41.5 months | Bayley (1935) | |
| Executes 1-3 hopping steps | 43 months | Wellman (1937) | |
| Throws a 9.5 inch ball 8 to 9 feet | 44 months | Wellman (1937) | |
| Catches a 16.25 inch ball with elbows in front | 34 months | Wellman and McCaskill (1938) |
