Here are some references we used to update it:
- McLeod, S., & Crowe, K. (2018). Children’s consonant acquisition in 27 languages: A cross-linguistic review. American Journal of Speech-Language Pathology, 27, 1546–1571. doi:10.1044/2018_AJSLP-17-0100
- 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, 266-276. doi:10.1044/2015_LSHSS-14-0120