Single Case Research Methodology: Applications in Special Education and Behavioral Sciences - Paperbackby Jennifer R. Ledford (Editor), David L. Gast (Editor) The fourth edition of this bestselling text provides a comprehensive discussion of single case research methodology, with updated information throughout the book, including new content on design types, design selection, social validity, fidelity, generality, visual analysis, and writing. Students, researchers, and practitioners can use this detailed reference tool to conduct single case research