Janson, SvanteVegelius, Jan2011-03-092011-03-091982Janson, Svante & Vegelius, Jan. (1982). The J-index as a measure of nominal scale response agreement. Applied Psychological Measurement, 6, 111-121. doi:10.1177/014662168200600111doi:10.1177/014662168200600111https://hdl.handle.net/11299/101371Some characteristics of Hubert’s Г, as a measure of nominal scale response agreement, are shown, including the characteristic that in a contingency table with equal frequencies its value will normally not be zero. By making a slight modification of its definition, some of these characteristics can be eliminated. As another alternative, the J-index is suggested. It is closely related to Г but does not have the same problematic characteristics. Some asymptotic variance formulas for the J-index are given, together with a numerical example.enArticle