Jati atroouction to sociology Quick Survey of research Findings B Cognitive Development the work of Jean Piaget a universal sequence of cognitive stages successively more sophisticated rules of reasoning not everyone makes it through all stages the work of Noam chomsky an inborn universal grammar(language instinctQuick Survey of Research Findings B. Cognitive Development • the work of Jean Piaget • a universal sequence of cognitive stages • successively more sophisticated rules of reasoning • not everyone makes it through all stages • the work of Noam Chomsky • an inborn universal grammar (language instinct)