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. Author manuscript; available in PMC: 2013 Jan 18.
Published in final edited form as: J Speech Lang Hear Res. 2010 Aug 10;53(5):1206–1219. doi: 10.1044/1092-4388(2010/09-0083)

Figure 6.

Figure 6

Determining phonetic variability. Panel A: Kinematic variability. The time- and amplitude-normalized principal component of the three-dimensional tongue movement is plotted for each repetition of /ia/. The SD within a 20-point window is plotted below the movement traces. Panel B: Acoustic variability. The time- and amplitude-normalized principal component of the first and second formant movement is plotted for each repetitions of /ia/. The SD within a 20-point window is plotted below the formant movement traces.