Nasal voice in boys with high-functioning autism spectrum disorder

This study compared speech samples of 29 boys aged 6–13 with high-functioning autism spectrum disorder (HFASD) to those of 29 typically developing (TD) boys matched on age and ethnicity. Ten listeners blind to speakers’ diagnoses rated speech samples for nasality and reported their perceptions of the speaker on a 6-point Likert-type scale. Results indicated significantly greater listener-perceived nasality in the HFASD than the TD group. Listeners rated the HFASD group significantly higher than the TD group on negative socially relevant adjectives, a finding which was mediated by nasality. In addition, compared to TD speakers, speakers with HFASD were rated lower on dominance and perceived age, as well as higher on perceived disability.