The application of a three-phase methodology to design an accessible photo CD player for older adults with mildly impaired vision

Abstract

<p>A three-phase methodology for designing accessible products for users with special needs was discussed. The effectiveness of the methodology was further evaluated through an application of the methodology to design an accessible Photo CD player for older adults with mildly impaired vision.</p> <p> Phase I involved identifying barriers on the user-interface of a Photo CD player for the target user population. Cost-effective solutions were identified in Phase II. An empirical study was conducted in Phase III to assess the effects of these solutions or modifications on the accessibility and usability of the Photo CD player. Thirty-two participants, aged 50 to 75, with 20/29 to 201100 near vision participated in the last phase of the study. Results of Phase III of the study indicated that the use of a larger RCV labeling with higher contrast improved the accessibility of a RCV for older users with presbyopia.</p> <p> The effectiveness of the three-phase methodology for designing accessible consumer products was supported by results of this study. The identification of access barriers in Phase I led to the selection of cost-effective design solutions in Phase II. The empirical evaluation conducted in Phase III provide verifications for the effectiveness of the design modifications for the target user population. The systematic application of relevant information on the user population in an iterative design process, which involves early and continuous empirical testing centered around appropriate users performing representative tasks, is essential in designing accessible products for people with special needs.</p>