A CODING SCHEME FOR USE IN THE DESIGN OF ELECTRONIC CONSUMER PRODUCTS FOR OLDER ADULTS
People’s ability to live independently depends increasingly on their ability to interact with electronic consumer products. Usability of controls and displays is key to effective interaction. This paper presents a coding scheme for the analysis of interfaces with a view to identifying design improvement opportunities. Verbal protocol analysis and videotape recordings were used to capture cognitive and physical aspects of interactions by two older users. The study found symbolic user interface elements were the most disabling because they caused most interaction breakdowns and focus-shifts.