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Many with intellectual disabilities (ID) have difficulties adhering to current physical activity guidelines. The goal of this study was to develop a mobile app for assisting people with ID to be more physically active. We implemented a solution that combines the digital and real world using augmented reality (AR). Eight people working with people with ID (special education teachers, social workers, psychologists, and researchers) tested the app and completed a usability test. Results indicate that a mobile app focusing on everyday life scenarios can have a potential value for the targeted user group, but AR solutions can be challenging. publishedVersion

People with intellectual disabilities often have a sedentary lifestyle that can lead to long-term issues like cardiovascular diseases, diabetes, obesity and depression. Although literature shows that the main reason for this is the lack of motivation to do physical activity, scarce research has been done in accessible apps to track and foster physical activities that address motivation. This paper presents HikePal, a game-inspired app to motivate individuals with intellectual disabilities to do physical activity outdoors. We have followed a design and creation research strategy using 1) semi-structured interviews with five experts (health care workers, special education experts and software engineers); 2) a focus group with an occupational therapist, a physical therapist and four software engineers; 3) a pilot user test with three individuals with intellectual disabilities and their caregivers. Having social interaction during the physical activity turned out to be a major motivational aspect of the system, whereas reward systems did not attract much of the users’ attention. Regarding the adapted navigational assistance, we found out that easy-to-read text, visual communication and street-level pictures were the key features to achieve successful and understandable guidance outdoors for people with intellectual disabilities. It proved useful to perform a test on the field and to refine the design guidelines in view of a forthcoming large-scale experimental test involving a larger number of persons with intellectual, sensory and motor disabilities.

International audience; Writing parallel programs is not easy, and debugging them is usually a nightmare. To cope with these diiculties, a structured approach to parallel programs using skeletons and template based compiler techniques has been developed over the past years by several researchers, including the P3L group in Pisa. This approach is based on the use of a set of primitive forms that are just functionals implemented via templates exploiting the underlying parallelism, so it is natural to ask whether marrying a real functional language like Ocaml with the P3L skeletons can be the basis of a powerful parallel programming environment. We show that this is the case: our prototype, written entirely in Ocaml using a limited form of closure passing, allows a very simple and clean programming style, shows real speed-up over a network of workstations and, as an added fundamental bonus, allows logical debug-ging of parallel programs in a sequential framework without changing the user code.