P2‐409: Assistive technologies for older adults with Alzheimer's disease: the Lusage user‐lab experience

Abstract

Over the past years, a number of assistive technology (AT) products have been conceived and developed to support independent living and quality of life of individuals with Alzheimer's disease (AD) and their caregivers. Some mainstream technological products can be also used for these purposes. However, little experimental research has been done on usability issues concerning these end-users. We describe the goals of LUSAGE, a usability laboratory specialized in elderly individuals with cognitive impairment. We present a general methodological framework for usability testing with this population and illustrate it with three studies: (a) Prototype software for cognitive training, (b) A graphic interface of an assistive robot, (d) Two sport video-games. After highlighting key findings and limitations we suggest future research directions in this field. Studies. The aim of these studies was to assess if the current product was usable by target users without major assistance and to expose all their major usability deficiencies. Target group. Older adults with mild-to-moderate AD. Procedure. The software and the video games user-test consisted of: One exploratory session and four test-sessions. Assessment of the robot's graphic interface was made in a single session. Interface manipulation and facial expression were video recorded. Quantitative and qualitative performance and preference measures were collected. Broadly participants could use the three systems with different levels of guidance. When conducting multiple test-sessions we noticed a general improvement in performance measures. Usability assessment allowed us to identify specific ergonomic deficiencies of each product. Our results confirm that not only specific cognitive loss but also behavioral, psychological and sensorial deficits influence the way individuals with AD interact with technological products. Cognitive functioning, disability level and socioeconomic background may vary a lot from one individual to another. Due to the heterogeneity of AD presentation it seems complicated to define one single profile that fits all potential users. Planning, designing and conceiving technologies to support AD patients and their caregivers require end-user involvement throughout all the development lifecycle. Usability assessment in laboratories specialized in this audience constitute an innovative enterprise. However further work is required for the development of adapted assessment methodologies.