Usability testing of the first prototype of the Memento system: a technological device to promote an independent living in people with dementia

Purpose Assistive technologies have the potential for supporting people with memory complaints in their daily life. User-centered interaction design research helps developers to create systems that are suitable for users. The aim of this work is to describe the methodology and the results of the usability test for the first Memento prototype involving users. Materials and methods In each country, 5 subjects with different levels of cognitive reserve and technical proficiency were enrolled in Italy, Austria and Spain, respectively (15 subjects; 6 M; 9 F, age 72.8 +/- 10.8 years, MMSE score 25.6 +/- 1.6). Observation methods, performance metrics and the System Usability Scale were used to collect data. Results The results are presented in terms of design, technical problems, target-group-related challenges and usability perception from the participant perspective. Suggestions for improvement were pointed out by the users. Considering the usability scores interpretation, the first prototype was classified as OK and Good by users. Conclusions The results of the Lab Trials provide important information on usability and the users' needs in order to improve the Memento prototype and to create a final system to be evaluated during the Field Trials phase of the project.Implication for rehabilitation The MEMENTO project mission is to improve the quality of life of people in the early and middle stages of dementia, by supporting the management of daily activities that are usually affected by the loss of memory and cognition. The Lab Trial phase is essential to have feedback on the usability of the Memento prototype to allow a better understanding of users' needs and expectations.

Automated summary

Assistive technologies have the potential to support people with memory complaints in daily life. User-centered interaction design research helps developers create systems suitable for users. Results from the usability test of the first Memento prototype, involving users from Italy, Austria and Spain, showed design, technical problems, target-group-related challenges and users' perception of usability, with suggestions for improvement highlighted by users.