Erikson , sexual (Freud , and moral (Kohlberg ) stages . The skills and mastery applied in the stage of formal education is obviously different from the activities wherein these skills are not applied that much . Through formal operational thinking , a person does not need much time in analyzing things because he can think abstractly . There would be fewer necessities for physical evidences so that he can conclude his point . The persons in the concrete operational system , say for example , are still limited in...











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