Applying Eye-Gaze Assistive Technology for Children and Youth With Complex Needs

Inclusion Criteria: * Diagnosed with severe physical disability without speaking abilities or with communication difficulties (level III\~V on the Communication Function Classification System (CFCS); level IV\~V on the Gross Motor Function Classification System (GMFCS) and Manual Ability Classification System (MACS); * Children have intentions to communicate using body movement, sounds, facial expressions or others, measured by Communication Matrix (Rowland, 2010) with some emerging skills in level 3; * No or limited possibilities to interact with computers using an input method other than EGAT (e.g. switch or touchpads) * With access to eye-gazed AT but not used it in daily routines; if possible, new to eye-gaze AT; * The parent or the teacher agrees to participate in supporting children to use eye-gaze AT in everyday life during the research period; * The therapist who has worked with the child demonstrated motivation to participate in this intervention. Exclusion Criteria: * Progressive diseases that caused functional declines, or serious illness