personality developmental psychology. All based on the book psychology by Saul Kassin The 25-page paper has to be APA style    Write for each person listed below 3 contributions, findings experiment, principles these people presented and how these things are still being used in the present day how these things are applicable in every day use how has these things impacted people in the fild what’s the significant of the findings what the understanding on psychology, 1 Freud = id ego defense meninism’s social cognitions 2 Pavlova 3 Jhon Watson 4 BF skinner 5 Edward Thorndike 6 Eran beck 7 Noam Chomsky 8 Eric Ericson 9 John Piaget 10 Lean Festinger 11 Lady Margret Mahler