The book has been written to be used as a research reference or as a referral text in an introduction to courses in teacher training in special education and for the research studies in special education and pre-service teacher preparation. It is appropriate for pre-service teacher trainees as well as the trainers in the field of special education. Since the book is based on the research work, it clarifies a number of idea closely related to special education. Professionals can understand techniques used in identifying research problems, forming hypotheses, using data gathering instruments and employing statistical procedures in special education. It is hoped that the book will be helpful and will serve as a useful resource for teacher trainees, special educators, research scholars and policy makers.