Verdugo, M. A., Arias, V. B., & Guillén, V. M. (2019). Are Type, Frequency, and Daily Time Equally Valid Estimators of Support Needs in Children With Intellectual Disability? A Multitrait–Multimethod Analysis of the Supports Intensity Scale for Children (SIS-C). Assessment, 26(7), 1307-1319. https://doi.org/10.1177/1073191117732411