This study presents data from a preschooler (aged 4;11) with a
phonological disorder involving the vocalic system. Assessment, using a
revised version of Pollock and Keiser's stimulus word list for examining
the vowels of English, shows that this child had a reduced, nine-vowel
system. She lacked the front low vowel /æ/, the back vowels /u/, /υ/ and
/o/, the low central vowel /a/, and the diphthong /au/. The low front
vowel was always produced as a back vowel, while the back tense
vowels were generally produced as diphthongs. Overall, 65% of her
vowels were correct. Intervention strategies were developed, targeting
the vowels /u/ and /æ/.
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