How much Screen Information can you handle? Making a Subway Ticket Machine more Accessible to the Elderly

Haechan Kim, Kun Pyo Lee, Y. Lee, Minji Cho, S. Kwon, Jaemyung Lee

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review


We explored the appropriate amount of screen information in the case of a subway ticket machine, for making smart public devices more accessible to older people. We determined interface barriers in using (1) a subway map and (2) a station overview matrix through two paper prototypes, in order to find the appropriate amount of information for each application, as well as to understand the relationship between information quantity and completion time efficiency. To ensure validity, data from older people was compared to that of a control group of young users. As a result, we identified how much screen information the elderly can handle when using digital maps and matrices. We defined an appropriate zooming range and an optimal matrix size to be shown on the screen. This study contributes to designing barrier-free public smart devices.
Original languageEnglish
Title of host publicationProceedings of the 6th IASDR (The International Association of Societies of Design Research Congress
Publication statusPublished - 2015
Externally publishedYes


  • Elderly users
  • Paper prototype
  • Map
  • Matrix

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