Two types of information are provided to aid users of ALSCAL in evaluating goodness of fit in nonmetric two-way and three-way multidimensional scaling analyses. First, equations are developed for estimating the expected values of SSTRESS and STRESS for random data. Second, a table is pro vided giving mean values of SSTRESS and STRESS for structured artificial data. This information pro vides the empirical investigator with a second com parative basis for evaluating values of these indices.
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Robert C. MacCallum (1981) studied this question.
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