Using a Speech-Generating Device to Support Communication in Rare Genetic Conditions

Inclusion Criteria: * Is between the ages of 3 and 12 years, inclusive, at the time of enrolment * Has a diagnosis of a rare genetic disorder * Passes a visual-motor screening test, therefore being able to tap on an iPad spontaneously or by imitation and has adequate hearing * Considered "minimally verbal" with less than 50 spontaneous words (or gestalts) at baseline assessments, confirmed with the LVIS. * Is not currently using a speech-generating device with proficiency (i.e. using the device as a main mode of communication on a daily basis). * Is English-speaking or consents to therapy being conducted in English (parents will need to be able to complete the parent-reported measures in English) Exclusion Criteria: * Has an additional or dual genetic variation (as this is likely to cause multiple complications and increase variability), * Is extremely ill or has progressed into a later stage of their disease (i.e. child has clinically significant loss of vision, hearing, fine motor skills, or is unable to adequately attend sessions due to illness), * This is to ensure treatment is beneficial, reduce harm and reduce attrition rates. * Lives outside of the state of Victoria (making it difficult for in-person appointments) * Inability or unwillingness of participant or legally acceptable representative to give written informed consent.