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A Simple Equation to Predict a Subscore's Value
Author(s) -
Feinberg Richard A.,
Wainer Howard
Publication year - 2014
Publication title -
educational measurement: issues and practice
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.158
H-Index - 52
eISSN - 1745-3992
pISSN - 0731-1745
DOI - 10.1111/emip.12035
Subject(s) - simple (philosophy) , value (mathematics) , statistics , mathematics , test (biology) , focus (optics) , structural equation modeling , econometrics , epistemology , philosophy , physics , geology , optics , paleontology
Subscores are often used to indicate test‐takers' relative strengths and weaknesses and so help focus remediation. But a subscore is not worth reporting if it is too unreliable to believe or if it contains no information that is not already contained in the total score. It is possible, through the use of a simple linear equation provided in this note, to determine if a particular subscore adds enough value to be worth reporting.