NDLI: Using a concept map to evaluate exploratory search

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Using a concept map to evaluate exploratory search

Content Provider	ACM Digital Library
Author	Takaku, Masao Terai, Hitoshi Miwa, Makiko Kando, Noriko Saito, Hitomi Egusa, Yuka
Abstract	Users often conduct exploratory searches on the Web to solve complex problems, but how for evaluating the effectiveness of a search, especially in a user-centered approach, remains an open question. We propose a user-centered method to evaluate the effectiveness of an exploratory search by focusing on the change in the users' mental representations of a topic during their exploratory search on the Web. This was done by comparing the concept maps depicted before and after each users searching. Thirty-five undergraduate students recruited from various departments and universities participated in our experiment. The participants were instructed to search for and gather Web pages for the task of writing a term paper on two given topics, politics and media, while working in either of two scenarios: "Selective scenario" (identifying only ten Web pages as important) and "As-Many-As scenario" (collecting as many Web pages as possible). The participants were divided into two groups: one group searched for both topics in the Selective scenario, and the other searched for them in the As-Many-As scenario. They composed their concept maps before and after searching. We defined the following measures to show the differences between the maps before and after a search to analyze the concept maps made by the participants: common, new, and lost map components like nodes, links, and link labels. We used these measures to compare the results from different topics, scenarios, and browser types. The results showed that the concept maps greatly changed after searching and that there were more common nodes and link labels in the Selective scenario than in the As-Many-As scenario. A comparative analysis of the concept maps between the pre- and post-search maps indicated that the users significantly changed their knowledge structure of a topic by completing the exploratory search task.
Starting Page	175
Ending Page	184
Page Count	10
File Format	PDF
ISBN	9781450302470
DOI	10.1145/1840784.1840810
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2010-08-18
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Concept map Tab browsing Task models User studies Exploratory search User experiments
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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