Gerald Malcolm Durrell was born in Jamshedpur, Bihar Province, India, on 7 January 1925, the fourth surviving child of Louisa Florence Durrell (nee NÃ©e), dixie aged-thirty, eight And Lawrence Samuel, durrell, forty a civil. engineer
In the 20th century, an American psychologist named Lawrence Kohlberg developed a model that explained how individuals develop morality. This model is known as Kohlberg's Stages of Moral Development. Kohlberg's model is composed of three stages, each of which includes two phases. The three stages are preconventional morality, conventional morality and postconventional morality.
In other words, cognitive development is the emergence of the ability to think and understand. A large portion of research has gone into understanding how a child imagines the world.Jean Piaget was a major force in the establishment of this field, forming his  theory of cognitive development .Piaget proposed four stages of cognitive development: the sensorimotor, preoperational, concrete operational and formal operational period. Many of his theoretical claims have since fallen out of favor. large portion of research has gone into understanding how a child imagines the world. Jean Piaget was a major force in the establishment of this field, forming his  theory of cognitive development .