電視遙控器頻道轉台介面使用性評估

Usability Improvement of TV Remote Controller Channel Switching Operation

吳宜芳(Yi-Fang Wu)

指導教授 ： 黃子坤

國立臺北科技大學/設計學院/創新設計研究所/碩士(2011年)

https://doi.org/10.6841/NTUT.2011.00608

摘要

本研究探討現有遙控器的使用方式，藉由觀察、焦點團體訪談以及資料分析歸納出使用著使用意見和問題。觀察中發現使用者在轉換頻道時，通常使用數字按鍵以及導航按鍵中的上下轉換台數按鍵。使用者使用數字鍵時尤其是老花眼的使用者，經常按到錯誤的數字鍵，造成困擾。本研究發展一組快速選台鍵，分別放置在導航按鍵的上下位置，當使用者要轉換附近台數時可以使用導航按鍵中的上下頻道選台鍵，轉換到較遠台數時可以使用快速選台鍵+10按鍵。
頻道轉台介面使用性頻估標的分別為快速選台鍵遙控器及傳統數字鍵遙控器，實驗項目包括錯誤率的績效、視覺焦點移動頻率及完成任務的時間結果之分析。(1)從錯誤率的績效，使用快速選台鍵遙控器優於數字鍵遙控器。(2)視覺焦點移動頻率，使用快速選台鍵遙控器少於數字鍵遙控器，平均少2.7次，明顯改善選台操作的心智負荷。(3)完成任務的時間分析(扣掉錯誤操作) ，快速選台鍵遙控器比較數字鍵遙控器平均快1.8秒。三項結果顯示快速選台鍵電視機遙控器具有較好的操作效率和使用者滿意度。
遙控器的整體按鍵多達40顆按鍵，讓使用者使用產生困擾，運用Multi-Layer Interface改善電視遙控器操作介面，進階使用按鍵放置在第二層介面，將初階使用者常用之按鍵放在第一層界面，加上本研究發展的導航按鍵群組，共11個按鍵分成三項群組，達成簡化易用的關係。

關鍵字

電視遙控器 ； 操作介面 ； Multilayer Interface

並列摘要

This research intended to improve channel switching operation that is the most frequently used function at a television remote controller. When surfing the channels, a pair of up/down keys (navigation key) are used on the television remote controller, while numeric keypad is used for the destination channel switching. In the pilot study, problems of using numeric keypad for channel switching were found, including error number operation and frequent shifting of vision focus between television screen and remote controller.
In order to improve the operation efficiency of channel switching, a pair of dedicated keys was utilized for fast channel switching. Two dedicated keys were set respectively near up/down keys (navigation key) and were design for the function of forward/backward 10 channels for every pushing down. A feasibility test was carried out to examine the dedicated keys’ operation efficiency and error rate against original numeric keypad. The results of experiment revealed that dedicated key operation performed less error rate than numeric keys did. Frequency of vision focus between television screen and remote controller was significantly reduced when using dedicated keys especially in the 40-60 age group. As a result, the proposed dedicated keys operation requires less cognitive effort which benefits older age group and all other users as well.
In addition, the concept of multi-layer interface was introduced to utilize a user friendly interface for both novice and expert users. The physical multi-layer interface of TV remote controller was design to hide most of infrequent used keys in the second layer, while 11 frequently used keys remained on the first layer.

並列關鍵字

dedicated keys ； multi-layer interface

參考文獻

[7] 張一岑(2003)，人因工程學，揚智文化事業股份有限公司

[13] Gaskell, G. (2000), Individual and Group Interviewing , Qualitative researching with text, image and sound: a practical handbook, Sage, pp.38-56.

[15] Horton, W. (1994), Icon Book, John Wiley & Sons Ins.

[18] Kacmar, Z. & Carey, J. (1991). Assessing the Usability of Icons in Interface, Behavior and Information Technology, Vol.10, No.6, pp. 443-457.

[19] Konrad, B. & Bruce, T. (2000). User interface design for electronic appliances, : Taylor &Francis Inc.