Descriptor
| Age Differences | 1 |
| Classification | 1 |
| Cognitive Development | 1 |
| Concept Formation | 1 |
| Infant Behavior | 1 |
| Infants | 1 |
| Longitudinal Studies | 1 |
| Object Manipulation | 1 |
| Serial Ordering | 1 |
Source
| Child Development | 1 |
Author
| Starkey, David | 1 |
Publication Type
| Journal Articles | 1 |
| Reports - Research | 1 |
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Peer reviewedStarkey, David – Child Development, 1981
Examines the issue of object sorting in early infancy. Forty-eight infants at 6, 9, and 12 months were presented with eight sets of small, manipulable objects. At six months, selective manipulation was absent; at nine months, 94 percent of the infants sequentially touched similar objects and at 12 months 100 percent did so. (Author/DB)
Descriptors: Age Differences, Classification, Cognitive Development, Concept Formation
