![]() ![]() Three experimental tasks were used: (1) a syllable count task with nonwords, replicated from previous work (2) a nonword repetition task and (3) a nonword span task. This study examines the status of the Sonority Sequencing Principle (SSP) in English-speaking individuals with dyslexia to ascertain whether sonority projection effects on targeted behavioral measures shown in previous findings generalize to facilitate performance on language tasks of known difficulty for these individuals. This new finding validates the use of multivariate analyses to connect English phonology and speech acoustics. One factor had center loadings around 4100 Hz, while the other was bimodal with peaks around 300 Hz and 2300 Hz. Our data show for the first time that the distribution of obstruents in English speech constitutes an L-shape related to two spectral factors on the three-dimensional configuration. Our second aim was to further identify acoustic correlates of English phonemes. This confirms that the origin-shifted factor analysis is more recommendable for future speech analyses, since it would reduce the generation of noise in resynthesized speech. The results showed that three spectral factors were obtained in four main frequency bands, but neither the cepstral liftering nor the origin shift distorted the essential characteristics of the factors. The methods mainly differed in whether to use cepstral liftering and an origin shift. Our first aim was to investigate whether these analyses would cause differences in the factor loadings and the extracted spectral-factor scores. A newly developed factor analysis, origin-shifted factor analysis, was compared with a normal factor analysis to analyze the spectral changes of English speech. ![]()
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