Wk1+sound+dev

Speech sound development

 Iowa-Nebraska Articulation Norms

 Smit, Hand, Freilinger, Bernthal, and Bird (1990). //Journal of Speech and Hearing Disorders, 55, 779-798.// [|Articulation chart] This chart has the same information but it may be clearer. [|Speech sound development chart]  **Bowen, C. (2006). Speech Intelligibility from 12 to 48 months. Retrieved from www.speech-language-therapy.com/intelligibility.htm on (date).** Intelligibility

 The term intelligibility refers to the proportion of a speaker's output that a listener can readily understand. In typical development, as children learn to talk, their comprehensibility to those around them steadily increases. In young children there is often quite a marked difference between single word (SW) and conversational speech (CS) intelligibility; between intelligibility to their close family members and intelligibility to unfamiliar listeners; and intelligibility in known versus unknown conversational topics. With regard to families, siblings may sometimes be more adept than parents in comprehending what their little brothers and sisters are saying. A key characteristic of children with ** [|speech sound disorders] ** is that they are often significantly less intelligible than non-speech-impaired children of the same age. An early source of typical intelligibility criteria came from Weiss (1982) who suggested that a child's speech should be:

26-50% intelligible by 2;0

51-70% intelligible by 2;6

71-80% intelligible by 3;0