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Deets, Allyn C. – Developmental Psychology, 1974
A study of the effect of the twin sibling relationship upon interactions between monkey mothers and infants. Findings provided strong support for the prediction that the twin sibling presence decreases the amount of behavior directed from infant to mother. Differences in maternal behavior were concluded to be reactions to differences in infant…
Descriptors: Animal Behavior, Behavior Patterns, Behavior Rating Scales, Behavioral Science Research