An experimental analysis of treatment effects on consonant clusters and ambisyllabic consonants in two adults with developmental phonological problems.

The effect of treatment on errors in consonant clusters and in ambisyllabic consonants were investigated in two adults with histories of developmental phonological problems. Using a multiple baseline across behaviors, ambisyllabic consonant errors were treated in bisyllabic words and consonant cluster errors were treated in two different cluster classes. Results indicated that treatment, consisting of a sound-referenced rebus approach, affected change in production of trained words as well as generalization to untrained words for targeted behaviors.