Crossword Puzzle Theories of DevelopmentOnline version Name the theory of development, or the theorist, to fill the crossword. by Alice Hale 1 Kohlberg's theory 2 Developer of ecological systems theory 3 Second stage of development according to Piaget 4 Erikson's theory of stage development 5 What Vygotsky considers essential for children to learn 6 Man who coined term Zone of Proximal Development 7 What Freud believed controlled morals and values 8 Theorist behind cognitive development stage theory 9 Man behind operant conditioning theory 10 What Erikson believes children develop during first stage of development 11 Father of psychosexual theory of stage development 3 2 11 10 9 4 7 6 1 8