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Download full textChilds, Ruth A.; Jaciw, Andrew P. – 2003
Matrix sampling of test items, the division of a set of items into different versions of a test form, is used by several large-scale testing programs. This Digest discusses nine categories of costs associated with matrix sampling. These categories are: (1) development costs; (2) materials costs; (3) administration costs; (4) educational costs; (5)…
Descriptors: Costs, Matrices, Reliability, Sampling
