Nandakumar, R. (1991). Traditional dimensionality vs. essential dimensionality . Journal of Educational Measurement, 28, 99-117.
2.
Nandakumar, R. (in press). Assessing dimensionality of real data. Applied Psychological Measurement.
3.
Nandakumar, R., & Stout, W. (in press). Refinements of Stout's procedure for assessing latent trait unidimensionality. Journal of Educational Statistics.
4.
Stout, W. (1987). A nonparametric approach for assessing latent trait unidimensionality. Psychometrika, 52, 589-617.
