Examlex
The states being filled from the beginning to end of the lanthanide series of atoms are:
Piaget
A Swiss psychologist known for his pioneering work in developmental psychology and his theory of cognitive development in children.
Tertiary Circular Reaction
A stage in Piaget's theory of cognitive development where infants explore their environment and learn through trial and error with repeated actions.
Object Permanence
The understanding that objects continue to exist even when they cannot be seen, heard, or touched, typically developed during infancy.
Variability Scheme
In psychology or research, it refers to a conceptual framework for understanding how variations or differences in data are structured or categorized.
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