1. Latent variable modeling in heterogeneous populations

   • Bengt O. Muthén

   OriginalPaper Pages: 557 - 585

2. Minimizing the number of observations: A generalization of the spearman-brown formula

   • P. F. Sanders
   • T. J. J. M. Theunissen
   • S. M. Baas

   OriginalPaper Pages: 587 - 598

3. An irt-based model for dichotomous longitudinal data

   • Gerhard H. Fischer

   OriginalPaper Pages: 599 - 624

4. Criterion-related construct validity

   • Paul R. Rosenbaum

   OriginalPaper Pages: 625 - 633

5. Extensions of the partial credit model

   • C. A. W. Glas
   • N. D. Verhelst

   OriginalPaper Pages: 635 - 659

6. The role of collateral information about examinees in item parameter estimation

   • Robert J. Mislevy
   • Kathleen M. Sheehan

   OriginalPaper Pages: 661 - 679

7. Item bias detection using loglinear irt

   • Henk Kelderman

   OriginalPaper Pages: 681 - 697

8. Clusteringn objects intok groups under optimal scaling of variables

   • Stef van Buuren
   • Willem J. Heiser

   OriginalPaper Pages: 699 - 706

9. A simulated annealing methodology for clusterwise linear regression

   • Wayne S. DeSarbo
   • Richard L. Oliver
   • Arvind Rangaswamy

   OriginalPaper Pages: 707 - 736

10. Ordinal network representation: Representing proximities by graphs

    • Karl Christoph Klauer

    OriginalPaper Pages: 737 - 750

11. The equivalence of two methods of parameter estimation for the rasch model

    • Larry G. Blackwood
    • Edwin L. Bradley

    OriginalPaper Pages: 751 - 754

12. Principals versus osmod: A comment on saito and otsu

    • Warren F. Kuhfeld
    • Forrest W. Young

    Notes And Comments Pages: 755 - 756

13. Program of the Psychometric Society 54th Annual Meeting July 6–9, 1989

    Report Pages: 757 - 759

14. Program of the Sixth European Meeting of the Psychometric Society University of Leuven, Belgium July 17–19, 1989

    Report Pages: 761 - 763

15. Minutes Psychometric Society Business Meeting July 7, 1989

    • Mark D. Reckase

    Report Pages: 765 - 766