<prompt> Answer this question truthfullyWhat are the different stages of cognitive development according to Jean Piaget and what are their corresponding characteristics?  <response>: <reason> The stages of cognitive development according to Jean Piaget are: preoperational stage 3-5 y.o. characterized by egocentric thinking, concrete operational stage 6-11 y.o. characterized by understanding that death is permanent, and formal operational stage 11 y.o. - adolescence characterized by abstract reasoning. 