Generalization of correct articulation in clusters

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Abstract
Cluster Reduction is purported to be a general phonological process applied by misarticulating children to simplify production of the two consonants in a cluster. In this study the generality of the process was explored in six misarticulating children. The children produced errors on all /s/ and /r/ or /l/ clusters in baseline. In a counterbalanced order three children were trained on /s/ clusters first and /r/ or /l/ clusters second in a multiple baseline design; whereas three children received training on /r/ clusters first and /s/ clusters second. Generalization to other forms of /s/ and /r/ or /l/ clusters was tested throughout training. Results showed that with one exception children generalized to within class clusters but not to across class clusters. It was concluded that if cluster error patterns reflect processes, the processes are not general enough to operate across classes, but rather, are confined to the cluster receiving training.

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