Inconsistent Speech Disorder (also called inconsistent phonological disorder) is a subtype of pediatric speech sound disorder characterized by unpredictable pronunciation of the same words. A child with this disorder may say a word several different ways on different attempts, showing variability in errors rather than a consistent pattern. This distinguishes it from more typical phonological delays or articulation disorders, and it is thought to reflect a breakdown in phonological planning (organizing the sounds in words) rather than an inability to produce specific sounds.
Dodd, Barbara, Alison Holm, Sharon Crosbie, and Beth McIntosh. “A Core Vocabulary Approach for Management of Inconsistent Speech Disorder.” Advances in Speech-Language Pathology 8, no. 3 (2006). Link
Bowen, Caroline. “Three Types of Inconsistency in Children’s Speech.” Speech-Language-Therapy.com, 2011. Link
