MacCallum, Robert C.2011-02-162011-02-161981MacCallum, Robert. (1981). Evaluating goodness of fit in nonmetric multidimensional scaling by ALSCAL. Applied Psychological Measurement, 5, 377-382. doi:10.1177/014662168100500311doi:10.1177/014662168100500311https://hdl.handle.net/11299/100413Two 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 provided giving mean values of SSTRESS and STRESS for structured artificial data. This information provides the empirical investigator with a second comparative basis for evaluating values of these indices.enArticle