Three problems with the ASI composite scores

Abstract

This article discusses three problems relating to the use and interpretation of the Addiction Severity Index (ASI) composite scores. First, the lack of standardized scores makes it difficult both to interpret and compare individual scores. Second, it is difficult to interpret a change in a composite score and to know whether this is a large or a small change. Finally, one might question the objective validity of some of the composite scores because some of the questions that go into the calculation of the composite scores invite subjective responses. Moreover, the argument that the validity of the ASI composite scores is assured by high Cronbach's alphas is rejected as largely irrelevant.