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Using Trilinear Plots for NAEP State Data NAEP

Wainer, Howard
Publication Year:
Report Number:
ETS Research Memorandum
Document Type:
Subject/Key Words:
Journal of Educational Measurement, Graphical Analysis, National Assessment of Educational Progress (NAEP), State Programs


Understanding the distribution of achievement levels of students' performance in the National Assessment of Educational Progress (NAEP) is aided through the use of trilinear charts. This chart is described and its use illustrated with data from the 1992 state NAEP mathematics assessment. It is shown that one can see readily the trends in performance for different demographic groups for all of the 44 participating jurisdictions simultaneously. It is suggested that this graphical form may be useful in other contexts as well.

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