S.K. Mangal, Ph.D. (Education), has been Principal, and Professor & Head of Department of Postgraduate Studies at C.R. College of Education, Rohtak, Haryana. Dr. Mangal has authored several books, including Essentials of Educational Psychology, Advanced Educational Psychology (Second Edition), Educating Exceptional Children: An Introduction to Special Education, Essentials of Educational Technology, Emotional Intelligence: Managing Emotions to Win in Life, Pedagogy of Social Sciences (Second Edition), Research Methodology in Behavioural Sciences and Statistics in Psychology and Education (Second Edition), published by PHI Learning. Professor Mangal has been a distinguished administrator and researcher. He has devised various educational and psychological tests and has published extensively in reputed journals.