Premium
EFFECTS OF EMPIRICAL OPTION WEIGHTING ON RELIABILITY AND VALIDITY OF AN ACADEMIC APTITUDE TEST 1
Author(s) -
REILLY RICHARD R.,
JACKSON REX
Publication year - 1973
Publication title -
journal of educational measurement
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.917
H-Index - 47
eISSN - 1745-3984
pISSN - 0022-0655
DOI - 10.1111/j.1745-3984.1973.tb00796.x
Subject(s) - guttman scale , weighting , reliability (semiconductor) , variance (accounting) , psychology , statistics , aptitude , item analysis , test (biology) , empirical research , psychometrics , mathematics , econometrics , medicine , power (physics) , physics , accounting , quantum mechanics , business , radiology , paleontology , biology
Item options of shortened forms of the GRE Verbal and Quantitative tests were empirically weighted by two variants of a method originally attributed to Guttman (1941). When compared with formula scores, it was found that tests scored with the empirical weights were more reliable but less valid when correlated with undergraduate GPA. A factor analysis revealed large increases in variance accounted for by the first factor. It was suggested that the weighting procedures used tended to capitalize on omitting behavior which, although a highly reliable tendency, may be invalid.