The approval of the Department of Psychology, dated 12/10/2014 to form a committee for discussion and governance researcher / Adel Samir Mohammed Hamdan restorer department and the Registrar of the Master's Degree in Education (Educational Psychology) Entitled relationship sample size the critical values for multiple comparisons dimensional methods in light of the number of groups and the level of significance Commission supervision and governance consists of D / Mahmoud Abdel Halim forgotten   Professor of Educational Psychology, Faculty of Education - University of Alexandria President and discussing D / Ahmed Osman Saleh Tantawi Professor Emeritus of Educational Psychology, Faculty of Education - Assiut University Members and discussing D / Ali Ahmed Sayed Mustafa Professor Emeritus of Educational Psychology, Faculty of Education - Assiut University Member and supervisor D / Imad Ahmed Hassan Ali Member and supervisor Professor of Educational Psychology, Faculty of Education, University of Assiut