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In the last years, researchers and therapists have pinpointed a number of critical aspects in current speech-language interventions. Several studies have explored the use of technology to overcome these barriers and to support speech-therapy in children with language impairments (e.g. DLD and ASD). In this paper, we propose a conceptual framework for designing linguistic activities (for assessment and training), based on advances in psycholinguistics. Moving from this theoretical framework, we identified a development process - from the UX design to coding of activities – which is based on a novel set of Design Patterns at multiple layers of abstraction. We then put this framework into practice by implementing these patterns into two technological solutions – tablet and robots – and performing an empirical study to evaluate their benefits. Our results, although still preliminary since they assessed only a tablet experimental condition, are promising for extending the identified Design Patterns to other technological solutions.

The dramatic increment of communication impairments among children increases the demand for intensive, highly accessible and low-cost interventions as well as new assessment and therapeutic tools. Our research aims at exploring the use of Conversational Agents (CAs) to support linguistic assessment and training among children with language impairment. One of the open research issues in this arena concerns the identification of the most appropriate form of "embodiment" of the CA for children to interact with. To this end, we evaluated the linguistic performance of 14 neuro-typical children and 3 children with language impairment comparing different CAs - physical object and virtual character - with "traditional" human interaction. Based on our analysis, we identify insights for the design of CA: the physicality does influence the performance of linguistic tasks for children with linguistic impairment. In addition, children seem to show a preference for the physical CA and perceived it as smarter than the virtual one.