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. Author manuscript; available in PMC: 2012 Aug 1.
Published in final edited form as: J Speech Lang Hear Res. 2011 Feb 4;54(4):1211–1223. doi: 10.1044/1092-4388(2010/09-0218)

Figure 2.

Figure 2

Bubble plots of pooled vowel identification for the five NH listeners. Bubble size corresponds to the total number of times a stimulus was identified as a member of that category. Each vowel category (top to bottom: / ɪ /, / ʊ /, / ɝ /) for each presentation level (left: 75 dB SPL; right: 95 dB SPL) is displayed on a separate panel. Light gray lines show average linear category boundaries calculated from data for twelve normal-hearing listeners in an earlier study (Maddox et al., 2002).