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Homogeneity means
Arnold Gesell
An American psychologist and pediatrician known for his work in child development and for establishing developmental milestones.
Jean Piaget
A Swiss psychologist known for his pioneering work in child development, especially his theory of cognitive development.
Built-In Reactions
Inherent responses present from birth that are physiologically based and do not need to be learned, such as reflexes or instinctive behaviors.
Reflexes
Automatic, involuntary responses or movements produced by the nervous system in reaction to external stimuli.
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