Internalization
Thesis: this concept connects historical usage, contemporary interpretation, and AST relation with explicit certainty labels.
Established HistoryWhere this fits
Tradition: Soviet Cultural-Historical. Related thinkers: vygotsky, luria, leontiev.
Internalization refers to the transformation of socially organized activity into reorganized individual psychological functions. It is not a simple copying of external forms, but a developmental restructuring through participation.
Relation to AST
AST extends this question by modeling which affective conditions stabilize or interrupt internalization across different socialization environments.