First and second formant frequencies of target vowels as a function of the context vowel (/i,æ,ɑ). A) Raw data. B) Formant frequency residual values, after the effect of speaker has been removed. C) Formant frequency residuals after the effect of speaker and target vowel are removed. D) Results after speaker, target vowel, place and voicing are removed. E) Results after speaker, target vowel, consonant and interactions are removed. F) Same as E, but the results of the neutral context are displayed as well