1. Two new test statistics for the rasch model

   • Arnold L. van den Wollenberg

   OriginalPaper Pages: 123 - 140

2. The relative error magnitude in three measures of change

   • Donald W. Zimmerman
   • Richard H. Williams

   OriginalPaper Pages: 141 - 147

3. A rasch model for partial credit scoring

   • Geoff N. Masters

   OriginalPaper Pages: 149 - 174

4. Marginal maximum likelihood estimation for the one-parameter logistic model

   • David Thissen

   OriginalPaper Pages: 175 - 186

5. Rank-reducibility of a symmetric matrix and sampling theory of minimum trace factor analysis

   • Alexander Shapiro

   OriginalPaper Pages: 187 - 199

6. Restricted multidimensional scaling models for asymmetric proximities

   • David G. Weeks
   • P. M. Bentler

   OriginalPaper Pages: 201 - 208

7. Factor analysis by instrumental variables methods

   • Gösta Hägglund

   OriginalPaper Pages: 209 - 222