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Peer reviewedYang, Raymond K.; And Others – Developmental Psychology, 1976
Measures of active sleep, quiet sleep, sucking, crying, body size and gestational age were factor analyzed for 137 normal newborns at 2 days of age. The results yielded 3 stable factors: reactivity-irritability, maturity, and reflexive and discriminative sucking. (JMB)
Descriptors: Behavior Patterns, Body Weight, Discrimination Learning, Factor Analysis
Hrncir, Elizabeth J. – 1979
The influence of age, sex, representational detail of objects (prototypicality) and adult play suggestions on children's progression of pretend behaviors was studied. A checklist was developed and utilized for coding the responses of 20 children (10 males, 10 females), to objects judged to be high and low prototypical by 12 adults. Children ranged…
Descriptors: Age Differences, Behavior Patterns, Cognitive Development, Factor Analysis
