Abstract
Recently various case studies on interface of information apparatus for aged people have been reported. For example, there is an experiment of display image modification based on aged people's vision characteristics for car navigation systems. The approach in these studies takes advantage of measured and analyzed result of quantitative user characteristics so that behavior of information apparatus matches users. However this approach hardly works in cases that quantitative analysis of user characteristics is difficult or there is trade-off among many factors. Accordingly we propose a model which adapts the interface without analysis of user characteristics. We call this model as "compensation model", because we set our goal on equality of accessibility to information by all users. In this paper, we described the compensation model and an experiment that shows necessity of the compensation.