Abstract
In Theories of Illness (1980) Murdock reported that theories of illness causation were not randomlydistributed with respect to world regions or language phyla. For example, witchcraft theories were prevalent among peoples of the Circum-Mediterranean and absent elsewhere. However, Murdock was unable to estimate the magnitude of either the regional or linguistic effect. In this paper Murdock's data are reanalyzed using the multivariate technique of optimal scaling, a method sensitive to interdependence among both cases and variables. The results of the optimal scaling are used to discuss the clustering of the theories of illness within world regions and language phyla.

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