EXPERIMENTER EFFECT By N., Sam M.S. - 70 One of 2 errors. (a) errors from the experimenter, (b) the bias from effects of the participants. See experimenter bias- experimenter expectancy effect. EXPERIMENTER EFFECT: "The experimenter effect deals with errors in experiments." Related Psychology Terms Evaluation of a Qualitative Study DELAYED REACTION ROSENTHAL EFFECT REACTION TIME (Response Latency) LASHLEY, KARL SPENCER (1890- 1958) ENERGIZER (Antidepressant) The Anatomy of Research and the Scientific Method Discrimination and Mental Illness in the LGBT Population THORNDIKE, EDWARD LEE (1874- 1949) CLINICAL PSYCHOLOGY Cite this page: N., Sam M.S., "EXPERIMENTER EFFECT," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/experimenter-effect/ (accessed December 7, 2022).