William Trochim
Over a four-decade career Bill developed foundational methodologies in applied social research — including group concept mapping, the regression discontinuity design, and the Systems Evaluation Protocol. He served as principal investigator on major grants from NSF and NIH, led large-scale evaluation initiatives across public health, behavioral science, and translational research, and collaborated with research teams, federal agencies, and nonprofits nationwide. His Research Methods Knowledge Base, free at conjointly.com/kb, has reached students worldwide.
This site is built for anyone who works at the intersection of research and practice — students learning the fundamentals, evaluators designing studies, and scientists trying to make sense of complex programs and systems. The resources here are offered in that same spirit: practical, grounded, and freely available.
A comprehensive archive of peer-reviewed articles, book chapters, invited addresses, and unpublished manuscripts spanning 50 years of work in evaluation, research design, and concept mapping.
Browse publications →A complete online workbook introducing computer and manual simulations of common research designs — randomized experiments, regression discontinuity, nonequivalent group designs, and regression artifacts.
Open the workbook →A resource guide for structured conceptual mapping — introductory readings, research papers, case studies, software guides, and an interactive methodology walkthrough.
Explore the guide →An interactive statistical advisor. Answer a short series of questions about your data and research design, and the tool will guide you to an appropriate statistical test.
Launch the advisor →