“…Thus, it takes time to navigate from page to page to identify relevant vocabulary, which requires high attention demands for children as they navigate an array of various symbols (Thistle & Wilkinson, 2017). This is especially true for individuals beginning to use AAC who have limited understanding on how to operate their AAC system (Beck et al, 2002) and lack motor planning to automate some navigation demands (Cooper et al, 2021; Thistle & Wilkinson, 2015). In addition, many children with CCN have physical difficulties, for which physical movement to select symbols on AAC systems takes more time, concentration, and coordination (Lund & Light, 2006).…”