The web design kaohsiung of this study is to investigate the decreases in the physical, sensorial, and cognitive ways for older adults, and to check whether the I/O mechanism and the elements of web interface design would influence their performance and attitude toward the browsing of WWW. We develop a conceptual model to express the decreases in the physical, sensorial, and cognitive ways for older adults and to show the relationship of the I/O mechanism, the elements
of web design kaohsiung and usability problems. Based on these elements, we develop the structure, hypotheses, and experiments of this study.

We firstly examine guidelines from literature review. Specific design improvements and general design guidelines for ol-
der WWW web design kaohsiung users are discussed. Three young usability experts have evaluated the homepages of
thetwo well-known Chinese news websites by using the methods of heuristic evaluation and eight-older-user think aloud.
The general agreement with the literature lends support to the notion that our findings are firm and general. We believe t-
hat Web page designers can improve the usability of Chinese web design kaohsiung web pages by applying the guideli-
nes proposed in this study.

The purpose of Experiment I is to compare the influences that the direct and indirect input mechanisms may have on older participants when they use either to browse WWW. We adopt one factor design. The dependences are performance time, errors, satisfaction, lost, and mental workload. Twenty-four voluntary participants, who are over 50 years old, are recruited and dispatched randomly to one of the three groups, including the touch, voice, and mouse groups. In the process, the
data were automatically recorded by the computer and questionnaires.

The purpose of Experiment II is to compare the influences that the direct and indirect input mechanisms have on older participants when they use either to search WWW. One factor design is adopted. The dependences are performance time, errors, satisfaction, lost, and mental workload. Twenty-three participants are recruited and dispatched randomly to one of
the three groups, including touch & written, voice, and mouse & keyboard groups. In the process the data were automati-
cally recorded by the computer and questionnaires.

The purpose of Experiment III is to compare the influence that the audio assignment output mechanism may have on older participants when they use it or don't use it to browse WWW. Repeated-measures web design kaohsiung and nested-factorial experiments are adopted. The dependences are performance time, memory, comprehension, satisfaction, and lo-
st. Sixteen participants are recruited and dispatched randomly to either of the video and audio groups. In the process, the data were automatically recorded by the computer and questionnaires.

The results web design kaohsiung of three experiments can be summarized into the following findings:
n Direct input device significantly outperformed indirect input device on "performance time", "learning effect", and "frustrated level" in browsing task.
n Direct input device significantly outperformed indirect input device on "performance time", "learning effect" in web design kaohsiung keyword searching task.
n Audio output device significantly outperformed input device on "performance time", "learning effect" in keyword searching task.The results indicate that, in general, direct input devices are useful for older adults in browsing and keyword searching in WWW system.