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Dworzynski, Katharina; Remington, Anna; Rijsdijk, Fruhling; Howell, Peter; Plomin, Robert – American Journal of Speech-Language Pathology, 2007
Purpose: The contribution of genetic factors in the persistence of and early recovery from stuttering was assessed. Method: Data from the Twins Early Development Study were employed. Parental reports regarding stuttering were collected at ages 2, 3, 4, and 7 years, and were used to classify speakers into recovered and persistent groups. Of 12,892…
Descriptors: Twins, Stuttering, Genetics, Etiology
Dworzynski, Katharina; Howell, Peter – Journal of Fluency Disorders, 2004
This study investigated how phonetic complexity affects stuttering rate in German and how this changes developmentally. Phonetic difficulty was assessed using Jakielski's index [Motor Organization in the Acquisition of Consonant Clusters, Dissertation/Ph.D. Thesis, University of Texas Austin, 1998] of phonetic complexity (IPC) in which words are…
Descriptors: Phonetics, Stuttering, German, Spanish