ERROR SCORE By N., Pam M.S. - April 7, 2013 Classical test theory. The diference between the expected score and the actual score. ERROR SCORE: "The error score is a difference found between an expected score and a real score." Related Psychology Terms TRUE SCORE RANK TRANSFORMATION RAW SCORE SPEED TEST ABSOLUTE ERROR APGAR SCORE TEST SOPHISTICATION EQUATED SCORE ITEM WEIGHTING UNUSUAL USES TEST Cite this page: N., Pam M.S., "ERROR SCORE," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/error-score/ (accessed December 6, 2019).