Abstract
<jats:p>This book focuses on the design of randomized field trials in education and related social sciences. The author begins by discussing the fundamental principles of research design, including a history of their use in science. He also discusses the logistics of planning and organizing trials, as well as statistical principles, measurement, and effect size for the purpose of showing how they are related to design sensitivity. The book concentrates on four fundamental designs that are most often used in education and the evaluation of social programs. These four designs lead to forty-four different designs, each of which has different sensitivity depending on different design parameters. These designs are particularly relevant to social science because they both illustrate and embody the fact that social experiments are embedded in social contexts that, through design necessities and design parameters, affect design sensitivity.</jats:p>