David L Rosenhan

David L. Rosenhan (1929–2012) was an American psychologist best known for the Rosenhan experiment, published in 1973 as 'On Being Sane in Insane Places,' which challenged the validity of psychiatric diagnoses by having pseudopatients gain admission to hospitals.[1][2][3] A pioneer in psychology and law, he examined jury selection, expert witnesses, and trial processes, serving as a professor of law and psychology at Stanford University from 1971 until his retirement in 1998.[4][5] He authored over 80 books and papers, was a former president of the American Psychological Association, and held leadership roles in psychology-law organizations.[4][7]