Cognitive development was studied extensively by which psychologist? carl jung ivan pavlov jean piaget sigmund freud according to piaget, the building of schema is a two part process consisting of: schema and mental mapping assimilation and accommodation perspective and convention concrete and abstract he four stages of cognitive development are: sensorimotor, pre-operational, concrete-operational, formal-operational sensorimotor, pre-operational, post-operational, formal-operational sensorimotor, concrete-operational, formal-operational, informal-operational pre-operational, post-operational, concrete-operational, formal-operational which psychologist came up with the theory of sociocultural cognitive development? vladimir bekhterev igor kon yuliya gippenreuter lev vygotsky a style of parenting that is democratic in nature, rules are not set in stone and childrens’ ideas and concerns are listened to. children of this style of parenting tend to be well adjusted and thrive. authoritative authoritarian permissive traditional erik erikson developed a theory of psychosocial developments where humans go through stages during a normal lifetime. 5 6 7 8