This document provides an overview of research design. It defines research design as the framework and methods chosen by a researcher to conduct a study. There are three main types of research design: data collection, measurement, and analysis. Successful research designs have key characteristics like neutrality, reliability, validity, and ability to generalize. Research designs can be qualitative or quantitative. Some common research design types are descriptive, experimental, correlational, diagnostic, and explanatory. The document outlines the purpose and process for each of these design types.