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Educational and Psychological Measurement
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On the Weighted G Index

Jan Vegelius

University of Uppsala, Sweden

The G index of agreement does not permit the use of various weights for its various items. The weighted G index described here, makes it possible to use unequal weights. The weighted G index satisfies the requirements of a scalar product between normalized vectors, and a Q component analysis may, therefore, be based on it. It is also invariant over item reflection.

Educational and Psychological Measurement, Vol. 37, No. 4, 839-842 (1977)
DOI: 10.1177/001316447703700404
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