Developmental Scales Developmental scales include information about typical speech and language development; the student’s skills are compared to the expected age of acquisition of skills (see ASHA’s Typical Speech and Language Development-resource for parents). Crowe and McLeod 2020 norms can be used to highlight sounds the student has mastered and has not mastered in consideration of a Speech or Language Impairment. See also Wisconsin Articulation Speech Development Infographic. (p. 8) (also see pp. 4-5)
Recent research (Hustad et al. 2020; McLeod et al. 2015; McLeod 2020) acknowledges that intelligibility varies by context (e.g., familiarity of listeners, word or discourse level, amount of background noise) and therefore intelligibility ratings must be interpreted with caution given the these variables. It is beneficial to obtain more than one sample in more than one context and to consider intelligibility within the context of other assessment activities conducted when considering a Speech or Language Impairment. (pp. 9-10, also see p. 11).
Here are the links that reference our work:
- https://dpi.wi.gov/sites/default/files/imce/sped/pdf/sl-assessment-speech-sound-prod.pdf
- https://dpi.wi.gov/sites/default/files/imce/sped/pdf/sl-sound-development-chart.pdf
- https://dpi.wi.gov/sites/default/files/imce/sped/pdf/sl-articulation-infographic.pdf
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| https://dpi.wi.gov/sites/default/files/imce/sped/pdf/sl-sound-development-chart.pdf |
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| https://dpi.wi.gov/sites/default/files/imce/sped/pdf/sl-articulation-infographic.pdf |
Here are the papers that they are citing:
Crowe, K., & McLeod, S. (2020). Children's English consonant acquisition in the United States: A review. American Journal of Speech-Language Pathology, 29(4), 2155–2169. https://doi.org/doi:10.1044/2020_AJSLP-19-00168
McLeod, S. (2020). Intelligibility in Context Scale: Cross-linguistic use, validity, and reliability. Speech, Language and Hearing, 23(1), 9–16. https://doi.org/10.1080/2050571X.2020.1718837
McLeod, S., Crowe, K., & Shahaeian, A. (2015). Intelligibility in Context Scale: Normative and validation data for English-speaking preschoolers. Language, Speech, and Hearing Services in Schools, 46(3), 266–276. https://doi.org/10.1044/2015_LSHSS-14-0120
