臺灣將在 2025 年晉升超高齡社會，除了將加重社會的經濟負擔，也慢慢浮現出一些社會照顧問題。舉例來說，臺灣 65 歲以上的獨居老人已高達將近四萬五千人，這類長者由於家中青壯年人口外出工作，除了無人隨侍在旁照顧日常所需容易發生意外，缺乏人際互動的關係亦是一大挑戰。此外，隨著行動觸控裝置的普及與 App 的發展，高齡者其實無可避免地須接觸這些新興科技與裝置，但相較於年輕人具備理解不同科技的敏感度，及能夠接受並處理繁雜資訊的能力，高齡者容易因身體退化，及認知和使用習慣差異導致高使用錯誤率，產生厭倦及排斥使用相關產品的想法。市面雖已有不少專為長者需求開發的應用程式，但在娛樂通信及社交相關的App應用程式仍然偏少，且大部分都非以臺灣長者為主要使用目標來進行設計，或在改良上僅以放大字體為主，少有將畫面整體性及功能層級的減少列為考慮因素及設計目標，無法滿足高齡者實際需求。
本研究以臺灣台南市力行里之長者為研究對象，在現有線上社交平台的架構下，開發一個符合大多數長者需求及使用難度之操作模式插件，以提升長者的使用率及學習相關產品之意願。初期先蒐集文獻資料及進行場域觀察，並邀請長者進行問卷和訪談來篩選不同背景及使用頻率之人，同時使用老年人行動裝置用戶界面能力評估對受試者進行熟練度分群，交叉比對找出更深層的使用習慣差異及可能因素。接著根據訪談得到的口語描述，一方面轉化成長者對 3C 產品的學習興趣因子並透過 5W1H ISM詮釋結構模型進行評比排序，訂定出平台開發設計目標，另一方面則將受試者遇到的問題點與期待轉為設計準則及元素，結合二者進行產品的設計開發。最後結合初期的能力分群結果，設計三種不同難度之SUS 易用性測試任務檢驗介面成效。結果表明，在基本功能操作下，改良介面的編排能些微提升操作效率；而在進階多層級操作下，改良介面的操作簡化能大幅降低操作時間並減低使用難度，而在測後訪談中，所有受試者皆表示待操作熟悉後使用及學習意願會上升，表示新開發的介面的確能滿足不同使用程度及能力的長者之期待與需求。

The proportion of Taiwan's elderly population will exceed 20% by 2025, which will increase the economic burden on the society, and some social care problems will also emerge. For example, there are nearly 45,000 elderly people over the age of 65 living alone in Taiwan. Since the young members are working, there is no one to take care of their daily needs, and the lack of human interaction is also a major challenge. In addition, with the popularity of mobile devices and the development of apps, seniors inevitably need to access these new technologies and devices. But compared to young people who have the sensitivity to understand different technologies and the ability to accept and process complex information, seniors are prone to physical deterioration and differences in cognitive and usage habits, resulting in high error rates, and even the idea of boredom and rejection of using related products. Although there are many apps developed for the needs of the elderly, there are still few apps for entertainment, communication, and social networking, and most of them are not designed with the Taiwanese elderly as the main target, or are improved only by enlarging the font size, with fewer considerations and design goals for the overall picture and reduction of function levels, which fails to satisfy the actual needs of the elderly.
In this study, the elderly in Lixingli, Tainan City, Taiwan, were targeted to develop a plug-in that meets the needs of the majority of the elderly and their difficulty in using the existing online social networking platform, in order to increase the utilization rate of the elderly and their willingness to learn the related products. Initially, we collected literature and conducted field observations, and invited the elderly to take questionnaires and conduct interviews to select people with different backgrounds and usage frequencies. At the same time, we used the Elderly Mobile Device User Interface Competency Assessment (EMUCA) to categorize the proficiency of the participants, and then we made a cross-comparison to find out the deeper differences in the usage habits and the possible factors. Based on the verbal descriptions obtained from the interviews, we transformed them into the learning interests of the elderly in 3C products on one hand, and evaluated and ranked them through the 5W1H ISM interpretation model to set the platform development and design objectives. While on the other hand, we transformed the problems and expectations encountered by the participants into the design criteria and elements, and combined them into the design. Finally, we combined the results of the initial competency grouping and designed three different levels of usability tests to examine the effectiveness of the interface. The results show that under the basic function operation, the arrangement of the improved interface can slightly improve the operation efficiency; and under the advanced multi-level operation, the simplified operation of the improved interface can greatly reduce the operation time and the difficulty of using the interface. In the post-test interview, all the subjects said that their willingness to use the interface and to learn will increase after they are familiar with the operation, which means that the newly-developed interface can really satisfy the expectations and needs of the elderly with different levels of use and ability. This indicates that the newly developed interface can really meet the expectations and needs of the elderly with different levels of usage and abilities.

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