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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
Peer reviewedLarzelere, Robert E.; And Others – Family Relations, 1989
Developed the Toddler Behavior Checklist (TBC) using parental reports of the frequencies of 103 patterns of behavior in children from 9 to 48 months old. Five scales were derived from factor analysis: Oppositional, Immaturity, Emotional Instability, Physical Aggression, and Shyness. Four scales demonstrated excellent reliability; reliability of…
Descriptors: Behavior Patterns, Behavior Problems, Behavior Rating Scales, Child Development
