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Hu, Xiangen; Batchelder, William H. – Psychometrika, 1994
The statistical analysis of processing tree models is advanced by showing how the parameters of estimation and hypothesis testing, based on the likelihood functions, can be accomplished by adapting the expectation-maximization (EM) algorithm. The adaptation makes it easy to program a personal computer to accomplish the stages of statistical…
Descriptors: Computer Software, Equations (Mathematics), Estimation (Mathematics), Hypothesis Testing