Judith D. Singer

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Fitting individual growth models using SAS PROC MIXED.

Judith D. Singer, J. Singer, 2002 .

Using SAS PROC MIXED to Fit Multilevel Models, Hierarchical Models, and Individual Growth Models

Judith D. Singer, J. Singer, 1998 .

Reshaping the Arc of Quantitative Educational Research: It’s Time to Broaden Our Paradigm

Judith D. Singer, J. Singer, 2019, Journal of Research on Educational Effectiveness.