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. Author manuscript; available in PMC: 2008 Dec 9.
Published in final edited form as: J Speech Lang Hear Res. 2007 Dec;50(6):1510–1545. doi: 10.1044/1092-4388(2007/104)

Figure 13.

Figure 13

Average F1, F2 & F3 values per study by chronological age (CA) for the vowel /i/ during the course of development for the 3 groups, children (green), females (red) and males (blue).