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2. Differential structuring of statistics concepts as evidence of meaningful learning. Presented at the Annual Meeting of the American Educational Research Association, Los Angeles, 1981.
3. Item sampling from finite domains of written discourse. Presented at the Annual Meeting of the American Educational Research Association, Toronto, 1978.
4. Convergent and discriminant validation by the multitrait-multimethod matrix.
5. Analysis of individual differences in multidimensional scaling via an n-way generalization of “Eckart-Young” decomposition