John Kelley

John Kelley was an influential American statistician known for his work in probability, statistics, and psychometrics. He developed the Kelley Formula, which is used in educational testing and assessment, enhancing the understanding of how test scores relate to true abilities. Kelley was also involved in advancing statistical methods to improve research in psychology and other fields. His contributions helped establish important principles in measurement theory, allowing researchers to more accurately evaluate skills and performances. Overall, Kelley’s work continues to impact how data is interpreted and applied in various disciplines.