A nonparametric measure of the association that exists between two sets of rankings. Siegel and Castellan (1988) describe this measure. (See also <a href="search.pl?p=Kendall rank correlation">Kendall rank correlation</a>.)<ul>
   <li><SPAN Plous, 
S. (1993), <I>Siegel, S. &amp; N. J. Castellan, Jr. (1988), 
<I>Nonparametric Statistics for the Behavioral Sciences</I>, 2<SUP>nd</SUP> ed. 
New York: McGraw-Hill.</SPAN></li>
 </ul>