Donald E. Campbell

Donald E. Campbell (1916–1996) was an American social psychologist best known for his work on experimental and statistical methods in behavioral research. He pioneered the use of rigorous scientific techniques to study human behavior, emphasizing the importance of controlling variables to understand causality. His contributions include developing the "Campbell Collaboration," a systematic review organization, and promoting a scientific approach to evaluating social programs and policies. Campbell's work has significantly influenced how researchers design experiments, interpret data, and apply evidence-based practices in social sciences.