An emerging trend of the healthcare industry is the huge increase in the number of medical devices being used by lay people at home. Home use medical devices range from simple inhalers to very complicated devices such as defibrillators. This research aimed to assist designers in developing home use medical devices by providing information and suggestions regarding lay users and how to address their needs and expectations. For this purpose a qualitative and inductive approach was adopted and several studies were carried out, including: (1) a comprehensive literature review to understand the background of the phenomena; (2) observational studies with 40 lay users (i.e. 10 younger lay users, 10 older lay users, 10 users with mobility and sensory disabilities, and 10 users with cognitive disabilities) in order to identify their characteristics when interacting with products; (3) an online questionnaire survey with 53 designers to understand designers‟ requirements when designing home use medical devices, as well as their expectations for a proposed design support tool; (4) the development of the design support tool; and (5) an evaluation study with 12 professional designers in order to assess the effectiveness of the tool (in a format of a design guidance). This research adopted an inclusive approach which investigated both lay users‟ characteristics and designers‟ perspectives. It has, for the first time, outlined lay user characteristics based on empirical studies with different groups of people. It is also one of few studies focussing on designing home use medical devices; the requirements of professional designers have provided an in-depth insight into the challenges of designing medical devices for use in the home environment. The design guidance, as commended by the designers in the evaluation, was the first comprehensive information source in the UK for the emerging home use medical device field where little support is currently available.

As artificial intelligence becomes more widespread, the need forexplanations on how the technology actually works increases.Previous research in the area has mainly focused on studyingexplanations for technologists and domain experts. Moreover, theuser's need for information is rarely accounted for. The purpose ofthis study is to examine which information needs lay users have indealing with the systems that employ artificial intelligence thatsurround them in their daily lives. In order to achieve the purpose ofthe study, as well as building on results from previous research,Netflix was chosen as the object of study. A qualitative study usingsemi-structured interviews was conducted. The research materialwas later analyzed, using thematic analysis. The results show thatthe users’ mental model, and the lack of information from Netflix,affected the users’ information needs. All participants expressedthat the information provided by Netflix was insufficient and thatthey wanted more information. / I takt med at kunstig intelligens blir tatt i bruk av stadig fleresystemer, øker behovet for forklaringer om hvordan teknologienfungerer. Tidligere forskning innen området har hovedsakeligfokusert på å studere forklaringer for teknologer ogdomeneeksperter. Brukernes faktiske informasjonsbehov gjøressjelden rede for. Hensikten med denne studien er å undersøkeinformasjonsbehovet lekbrukere har i møte med de systemer somomgir dem i dagliglivet, som benytter seg av kunstig intelligens. Forå oppnå hensikten med studien, samt å ta hensyn til forslag fratidligere forskning, ble Netflix valgt som studieobjekt. Det blegjennomført en kvalitativ studie med semistrukturerte intervjuer.Materialet som ble samlet inn ble analysert ved hjelp av tematiskanalyse. Resultatet viser at brukerens mentale modell ogmanglende informasjon fra Netflix påvirket deresinformasjonsbehov. Alle deltakerne uttrykte at informasjonen fraNetflix var mangelfull, samt at de ønsket mer informasjon.