Descriptor
| Age Differences | 1 |
| Cognitive Development | 1 |
| Concept Formation | 1 |
| Developmental Tasks | 1 |
| Infant Behavior | 1 |
| Infants | 1 |
| Longitudinal Studies | 1 |
| Performance Factors | 1 |
| Piagetian Theory | 1 |
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| Developmental Psychology | 1 |
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| Willatts, Peter | 1 |
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| Journal Articles | 1 |
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Peer reviewedWillatts, Peter – Developmental Psychology, 1999
Three longitudinal studies examined means-ends behavior of 6- to 8-month olds. Found that intentional means-end behavior increased between 6 and 7 months, with 7-month olds' performance influenced by the presence of a toy on the cloth. Performance was the same when cloth was attached to or separate from the toy. By 8 months, infants adjusted…
Descriptors: Age Differences, Cognitive Development, Concept Formation, Developmental Tasks
