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Multidimensional Scaling2
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Psychometrika2
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MacCallum, Robert C.1
Sattath, Shmuel1
Tversky, Amos1
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Additive Similarity Trees
Peer reviewed Peer reviewed
Sattath, Shmuel; Tversky, Amos – Psychometrika, 1977
Tree representations of similarity data are investigated. Hierarchical clustering is critically examined, and a more general procedure, called the additive tree, is presented. The additive tree representation is then compared to multidimensional scaling. (Author/JKS)
Descriptors: Cluster Analysis, Computer Programs, Multidimensional Scaling, Statistical Data
Recovery of Structure in Incomplete Data by ALSCAL.
Peer reviewed Peer reviewed
MacCallum, Robert C. – Psychometrika, 1979
A Monte Carlo study investigated the ability of the ALSCAL multidimensional scaling program to recover true structure inherent in simulated proximity measures when data were missing. The program worked well with up to 60 percent missing data as long as sample size was large and random error was low. (Author/JKS)
Descriptors: Computer Programs, Multidimensional Scaling, Program Effectiveness, Simulation