Theory which posits that the expectations of an experimenter concerning the results of an experiment may have an unconscious effect which directs the results of said experiment toward the expectation of the experimenter. Often used interchangeably with experimenter expectancy effect.

ROSENTHAL EFFECT: "The Rosenthal Effect was posited by Robert Rosenthal (1933-), U.S. psychologist."
Cite this page: N., Pam M.S., "ROSENTHAL EFFECT," in, April 28, 2013, (accessed June 27, 2020).