Educational Research: An Introduction, Eighth Edition, is the most comprehensive and widely respected text for scholars and for the preparation of graduate-level students who need to understand educational research in depth and conduct original research for a dissertation or thesis. A comprehensive introduction to the major research methods and types of data analysis used today, this text provides in-depth coverage of all facets of research, from the epistemology of quantitative and qualitative scientific inquiry to the design, data collection, analysis, and reporting of a completed study.