limitations of piagets theory
>limited explanation: Piaget doesn't see experts as a central role for learning which contrasts vygotsky who sees learning as a social process
>equilibration overemphasised: not all children equally motivated to remove disequilibrium, lacks validity as equilibration was central role
>role of language: Piaget sees language as just as cognitive ability what develops in line with other abilities, but vygotsky sees language as more important