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Direct linkMaas, Edwin; Mailend, Marja-Liisa; Guenther, Frank H. – Journal of Speech, Language, and Hearing Research, 2015
Purpose: This study was designed to test two hypotheses about apraxia of speech (AOS) derived from the Directions Into Velocities of Articulators (DIVA) model (Guenther et al., 2006): the feedforward system deficit hypothesis and the feedback system deficit hypothesis. Method: The authors used noise masking to minimize auditory feedback during…
Descriptors: Speech Impairments, Articulation (Speech), Hypothesis Testing, Feedback (Response)
Jacks, Adam; Mathes, Katey A.; Marquardt, Thomas P. – Journal of Speech, Language, and Hearing Research, 2010
Purpose: To investigate the hypothesis that vowel production is more variable in adults with acquired apraxia of speech (AOS) relative to healthy individuals with unimpaired speech. Vowel formant frequency measures were selected as the specific target of focus. Method: Seven adults with AOS and aphasia produced 15 repetitions of 6 American English…
Descriptors: Vowels, Speech Impairments, Acoustics, North American English
