Using logic children betwen the age of 9 and 11

In this research, It has been aimed to measure the ability of using logic of the students between the age of 9 and 11 and to investigate the influence of concrete thinking competence which is the property of this period, on the faculty of using logic.In the study, It has been aimed to determine the level of students `logical inference competence between the age of 9 and 11 and to determine the difference of the level of students' being able to use their logic who have education in different socio-economic and cultural environment.Fort he purpose of this, logical mental test has been carried out to the children who have education in schools which are in different socio-economic and cultural environment and the results have been evaluated by depending on the post-Hoc LSD analysis.In the conclusion of the analysises, It has been determined that there are a meaningful difference in the level of students' being able to use their logic who have education in schools which are in different socio-economic and cultural environment.With taking account the researches' digonosises, comments and recommendations have been made.Keys WordsLogic, Cognitive Development, Magical Operation,