2019 年 3 巻 1 号 p. 1_27-1_36
The purpose of this study was to develop a design information application (app) based on the first phase of the overall study, in which nine older people with mild dementia were recruited. The participants' requirements for affordances of specific functions, operating behaviors, and operability regarding the components of rice cookers were identified through operation task analysis and usability evaluation. A design information app was established using a computer program for the affordance requirements of the operating components of a rice cooker in this study. The app's content is information on functional items: operating components, operating functions, and design requirements. Seven design practitioners evaluated the usability of the app, with the evaluated aspects including the information content and interface design. The results indicated that the information content was helpful in improving the designs of the operating components, but the operation interface lacked image instructions and aesthetics. A dynamic presentation of the design information should be considered. The results can serve as a crucial reference for subsequent improvement of the operation interface and information presentation of the design information app, with the objective of enhancing designer users' use intention.