Jacob Cohen

Who was Jacob Cohen?

Jacob Cohen was a United States statistician and psychologist best known for his work on statistical power and effect size, which helped to lay foundations for current statistical meta-analysis and the methods of estimation statistics. He gave his name to Cohen's kappa and Cohen's d.

He received his PhD in clinical psychology at New York University in 1950. Between 1959 and retirement in 1993 he worked in the psychology department at New York University, latterly as the head of the quantitative psychology group.