TY - GEN AU - Sijtsma, K. AU - Molenaar,Ivo W. TI - Introduction to nonparametric item response theory T2 - Measurement methods for the social sciences series SN - 0761908129 (alk. paper) U1 - 519.5 PY - 2002/// CY - Thousand Oaks, Calif. PB - SAGE Publications KW - Nonparametric statistics KW - Item response theory KW - Statistical methods N1 - Includes bibliographical references (p. 157-164) and index UR - http://www.loc.gov/catdir/enhancements/fy0658/2002000393-d.html ER -