John Ridley Stroop

John Ridley Stroop (March 21, 1897-September 1, 1973) was an American psychologist.

Stroop was born in Rutherford County, Tennessee, USA. He developed a color-word task, named after him (the Stroop effect), to demonstrate interference in attention.

After obtaining his PhD from the George Peabody College he left psychology, ending up in Nashville, Tennessee, where he became professor of biblical studies in the David Lipscomb University.