A contextual link scheme for effective navigation design and evaluation : 다양한 웹 시스템을 위한 정황적 항해 지원 도구 및 평가 척도 개발

국문 초록 (Abstract)

웹에 대한 기술이 급속도로 발전하고 있음에도 불구하고, 사용자들은 여전히 여러 웹 사이트를 항해하면서 다양한 과업을 수행하는데 어려움을 경험하고 있다. 이러한 항해 문제가 발생하는 원인 중 한 가지는 웹 시스템이 사용자에게 적절한 정황 정보를 제공해주지 못하고 있기 때문이다. 본 연구에서는 정황 정보가 사용자의 항해 경험에 미치는 영향을 실험 연구와 현장 연구를 통해서 알아보고자 하였다. 실험 연구에서는, 구조적 정황 정보와 시간적 정황 정보를 제공하기 위한 링크 도식을 개발하여, 이러한 두 가지 종류의 정황 정보가 서로 다른 두 도메인과 과업에서 사용자의 항해 행태에 어떠한 영향을 미치는지를 알아보았다. 실험 결과, 정황 정보의 제공이 상거래 사이트와 콘텐츠 사이트 모두에서 과업의 종류에 관계없이 유의미하게 사용자의 항해 편리성을 향상시키는 것으로 나타났다. 현장 연구에서는 이러한 실험 연구 결과를 바탕으로, 실제 웹 환경에서 웹 사이트를 구성하고 있는 모든 링크 속성들을 구조적 정황 정보와 시간적 정황 정보에 따라 분류하고, 객관적으로 측정할 수 있는 요소들을 추출하여 항해 평가 척도를 개발하였다. 객관적으로 평가된 정황적 링크 속성들과 사용자의 주관적인 만족도와의 관계를 분석한 결과, 많은 수의 정황적 링크들이 제공될수록 사용자의 항해 편리성과 전반적인 만족도가 증가하는 것으로 나타났다. 본 연구는 효과적인 항해 시스템을 설계하고 평가하기 위한 이론적 기초와 실용적인 지침을 제공할 것으로 기대된다.

다국어 초록 (Multilingual Abstract)

In spite of the radical enhancement of Web technologies, many users still continue to experience severe difficulties in navigating Web systems. One way to reduce the navigation difficulties is to provide context information that explains the current situation of Web users. In order to investigate the effect of context information, we used two major methods: experimental study and field study. In the study 1, we developed the contextual navigation aids by changing link properties, and then empirically examined the effect of two types of context information, structural and temporal context. In our experiment, participants answered a set of post-questionnaires after performing several searching and browsing tasks. The results of the experiment reveal that the two types of contextual navigation aids significantly improved the performance of the given tasks regardless of different web systems and different task types. Moreover, context information changed the users navigation patterns, and increased their subjective convenience of navigation. In the study 2, we suggested the contextual navigation metrics, and then investigated the relationships between user satisfaction and the contextual link attributes. In a field study, participants were asked to complete a questionnaire aimed at assessing their perceived quality of Web sites. Then, we evaluated 80 sites based on the 44 objective features of the contextual links using a binary scoring method. Similar to the results of experimental studies, all of the results of field study indicate that contextual links have a power role in navigation convenience and perceived satisfaction. This study concludes with implications for understanding the users navigation patterns and for developing effective navigation systems.

목차 (Table of Contents)

• TABLE OF CONTENTS = i
• List of Tables = iii
• List of Figures = iv
• Abstract = vi
• 1 Introduction = 1
• 2 Context Management in Navigation = 5
• 2.1 Context = 5
• 2.2 Types of Tasks = 10
• 2.3 Contextual Navigation Aids = 13
• 2.4 Contextual Link Attributes = 17
• 2.4.1 Structural-Contextual Links = 18
• 2.4.2 Temporal-Contextual Links = 21
• 2.5 Objectives of This Study = 25
• 3 Study 1. Experimental Study: Navigation Design = 26
• 3.1 Experiment 1: Electronic Commerce Systems = 29
• 3.1.1 Method = 29
• 3.1.2 Results = 36
• 3.2 Experiment 2: Content Dissemination Systems = 45
• 3.2.1 Method = 45
• 3.2.2 Results = 49
• 3.3 Conclusion and Discussion for Study 1 = 59
• 4 Study 2. Field Study: Navigation Metrics = 65
• 4.1 Method = 67
• 4.2 Results = 74
• 4.3 Conclusion and Discussion for Study 2 = 93
• 5 General Conclusion and Discussion = 97
• Reference = 100
• Abstract in Korean = 108

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