視障者用搜尋網站之設計｜國立清華大學博碩士論文庫

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研究生：	楊以凡 Yi-Fan Yang
論文名稱：	視障者用搜尋網站之設計 Specialized Design of Web Search Engine for the Blind People
指導教授：	黃雪玲 Sheue-Ling Hwang
口試委員:
學位類別：	碩士 Master
系所名稱：	工學院 - 工業工程與工程管理學系 Department of Industrial Engineering and Engineering Management
論文出版年：	2006
畢業學年度：	94
語文別：	英文
論文頁數：	78
中文關鍵詞：	搜尋網站、盲人、搜尋行為、無障礙網頁、Google
外文關鍵詞：	Web search engine, Blind, Web searching, Web accessibility, Google
相關次數：	點閱：1 下載：0
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隨著時代的進步，網際網路的影響可說是無遠弗屆，縮短了人與人之間的距離。但許多網頁設計者為了突顯網頁的特色與吸引眾人的目光，使用了大量華麗的影音內容，但卻未同時考慮身心障礙者在瀏覽這些網頁時，所可能遇到的困難。特別是對於無法使用眼睛瀏覽網頁的視障者，若無法讓他們順利地使用網路資源，便有可能因為設計上的不足而被拒於網路世界的門外。本研究以Google網站為改善對象，建構一視障者專用網路搜尋引擎(SSEB)，設計具有親和力的無障礙介面、搜尋輔助、以及個人化特殊功能，藉此提高使用者之搜尋績效。實驗結果顯示SSEB可顯著提升視障者的搜尋正確率、減少搜尋時間，而學習績效與使用者整體滿意度亦皆較Google理想。本研究結果證實，在網站規劃時加入一些針對特殊使用者的設計考量，即能對這些使用者提供極大的幫助。期未來發展能更擴大對象與範圍，讓所有人都能夠跟上網際網路變化的速度，不再因為自身的障礙與限制妨礙了學習的效果。

As time goes on, the influence of Internet becomes more and more noticeable. Internet has shortened the distance between each other. With the development of multimedia technology, a lot of webpage designers use a large number of magnificent audio-visual contents to make the characteristics of the webpage stand out and attractive. However, the difficulties which the disabled persons have when browsing through the webpages have not been taken into consideration. As a result, the disabled persons, especially the blind people can not use the resources of Internet swimmingly, and thus they may be refused by the Internet, not to mention that they can surf the Web by themselves.
In this research, Google Website was taken as a Web prototype to get modified. Specialized Search Engine for the Blind (SSEB) was constructed with an accessible interface and some improved functions (i.e., searching assistance functions, user-centered functions, and specialized design for the blind). An experiment was conducted to verify the effect of SSEB. From experimental results, it’s significant that users attained better performance in SSEB than in Google. Users also showed higher satisfaction with SSEB.
This research proves that the consideration for designing an accessible website for the blind users is very important. It is expected that the users group of SSEB can be expanded to all visual-impaired people in the future. So that all people can keep pace with the changing World Wide Web, and make good use of all the Internet resources without disabilities and limitations.

Abstract …………………………………………………………………………...…. I
Content ……………………………………………………………………….......… IV
Figure Captions …………………………………………………………………...…VI
List of Tables ………………………………………………………………………..VII
Chapter1 Introduction ……………………………………………………………..… 1
1 Motivation ……………………………………………………………………… 1
2 Objectives ……………….……………………………………………………… 2
3 Research framework …….……………………………………………………… 3
Chapter 2 Literature Review ………………………………………………………… 5
1 Web Accessibility ………….…………………………………………………… 5
1.1 The current Internet situation for the people with disabilities ….…………… 6
1.2 The difficulties for the people with disabilities in surfing the web ….……… 7
1.3 Web Content Accessibility Guidelines ………………………………..…….. 7
1.3.1 Validation and Verification of Web Content Accessibility Guidelines …... 8
1.3.2 The differences between WCAG 1.0 and WCAG 2.0 …………………… 9
2 Braille computer systems ………………………………………………………. 9
2.1 The purpose of designing Braille Computers and the present situation …… 11
2.2 The difficulties of the people with visual impairment when browsing
 through the webpages …..……………………………………………..…… 12
2.3 Audio supplementary instruments …………………………………….…… 13
3 Web searching tasks ………………………………………………………...… 14
3.1 Introduction to search engines …………………………………………..… 15
3.2 Web users’ searching model ……………………………………………..… 16
3.3 Factors affecting web information searching …………………………….... 18
3.4 Orientation, navigation assistance and site maps …………………….……. 19
3.5 Special assistive functions ……………………………………………….. 21
4 Summary ……………………………………………………………………… 22
Ch3 Research Method ……………………………………………………………… 24
1 Basic structure ………………………………………………………………… 24
1.1 Operational-need for the blind people ………………………………...…… 24
1.2 The blind people’s suggestion ……………………………………………... 25
1.3 System requirements ………………………………………………….…… 26
1.4 Primary improvements of SSEB ….…………………………………..…… 27
2 Functions and interface design ……………………………………………...… 27
2.1 Searching conditions …………………………………………………….… 27
2.1.1 Original items of Google Advanced Search ………………………….… 27
2.1.2 Improved searching strategy …………………………………………… 28
2.2 Search results ……………………………………………………………… 29
2.2.1 Original instruction elements of Google search results page ………...… 29
2.2.2 Improved layout of search results ……………………………………… 31
2.3 Specialized design for the blind users ………………………………...…… 32
3 Constructing SSEB ………………………………………………………….… 32
3.1 Basic functions …………………………..………………………………… 33
3.2 New establishing functions ……………………………...………………… 34
4 Experiment and verification …………………………………………………... 38
4.1 Experimental tasks ……………………………………………………...…. 38
4.2 Subjects ………………………………………………….………………… 38
4.3 Apparatus and Environment ……………………………………………….. 39
4.4 Pilot Study ……………………………………………………………….… 39
4.5 Procedure ………………………………………………………………...… 40
4.6 Criteria measurement ……………………………………………………… 41
Chapter 4 Results ……………………………………………………...…………… 43
1 The searching time …………………………………………………….……… 43
2 The correct rate ……………………………………………………...………… 46
3 The analysis of the subjective questionnaires ………………………………… 50
3.1 Users’ preference for SSEB or Google …………………………..………… 50
3.2 Users’ integral evaluation of SSEB ………………………………...……… 51
4 Discussion ……………………………………………………………..……… 52
Chapter 5 Conclusion …………………………………………………………….… 55
1 Contribution of the research ………………………………………………...… 55
2 Limitations of experiments ………………………………………………….… 56
3 Future work …………………………………………………………………… 56
Reference …..…………………………………………………………………..…… 58
Appendix I …………………………………………………………………...………63
Appendix II ………………………………………………………………….........…65
Appendix III ………………………………………………………………........……68
Appendix IV …………………………………………………………………………76

                                

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