As Part of the Cleveland Family Study of Speech and Language

As part of the Cleveland Family Study of Speech and Language Disorders, Lewis et al. (2015) reported that if speech sound disorder persists into adolescence, the speech errors can include:

A) errors of syllable omission and the insertion of glottal stops.
B) atypical production of velars.
C) polysyllable errors only, as all other consonants, vowels and stress patterns have been mastered.
D) polysyllable errors, distortions of /s, z, , l/, substitution errors, phonological processes (e.g., cluster reduction) , and possible abnormal voice, prosody, and fluency.