QUARTILE DEVIATION By N., Sam M.S. - 78 A measure of dispersion. The deviation is described as half the distance between the first and third quartiles. QUARTILE DEVIATION: "The quartile deviation seemed off to the examiner." Related Psychology Terms SEXUAL DEVIATIONS (GENERAL) CEREBRAL CORTEX Comparison of Assessment Tools HYPERMNESIA BESTIALITY (Zooerasty, Zoophilia) ADOLESCENCE (Theories) AUDITORY SPACE PERCEPTIO LIE DETECTOR ROSENZWEIG PICTURE-FRUSTRATION STUDY (P-F) INHIBITION Cite this page: N., Sam M.S., "QUARTILE DEVIATION," in PsychologyDictionary.org, April 28, 2013, https://psychologydictionary.org/quartile-deviation/ (accessed November 27, 2022).