An Ordinal Scale Generalization of the G Index Invariant Over Item Reflection
- 1 April 1977
- journal article
- research article
- Published by SAGE Publications in Educational and Psychological Measurement
- Vol. 37 (1) , 31-35
- https://doi.org/10.1177/001316447703700104
Abstract
A new type of scale, called the bipolar ordinal scale, is defined with assumptions slightly stronger than those of the normal ordinal scale. A similarity index, called r BP, is defined between persons with scores on this scale. It is invariant over item reflection. It is also an E-correlation coefficient and can thus be used in a Q-analysis.Keywords
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