A Rich OPAC User Interface with AJAX

Jesse Prabawa Gozali and Min-Yen Kan

WING (Web IR / NLP Group)National University of Singapore

Jesse Prabawa and Min-Yen Kan, Digital Libraries

222 June 2007 - JCDL (Session O) 2Web IR / NLP Group @ NUS

Introduction and Motivation3

1

2

4

Jesse Prabawa and Min-Yen Kan, Digital Libraries

322 June 2007 - JCDL (Session O)

Related Works

Google’s multiple suggestions Endeca’s guided navigation (NCSU Libraries)

PINES' incremental loading (Georgia Library)

Conclusion•Cosmetic difference•Page-oriented•None specifically dealing with:

• Interaction history• Seeing overview and details

simultaneously

Jesse Prabawa and Min-Yen Kan, Digital Libraries

422 June 2007 - JCDL (Session O)

Key areas of improvement

• Goal–Leverage current dynamic web technologies to provide a

usable and rich environment that better supports user information-seeking tasks.

• Key Areas–Keyword suggestions

–Dual-pane view: Overview + Details

–Tabs as a history mechanism

–Rich results table: sort, add, remove columns

Web IR / NLP Group @ NUS

Jesse Prabawa and Min-Yen Kan, Digital Libraries

522 June 2007 - JCDL (Session O) 5Web IR / NLP Group @ NUS

A Richer Dynamic User Interface

3

1

2

4

Jesse Prabawa and Min-Yen Kan, Digital Libraries

622 June 2007 - JCDL (Session O) 6Web IR / NLP Group @ NUS

Prototype Demo

http://opac.comp.nus.edu.sg

Differs slightly from system mentioned in the paper

Jesse Prabawa and Min-Yen Kan, Digital Libraries

722 June 2007 - JCDL (Session O)

Evaluation Results

• Formative Evaluation (Dec 2006): –5 users performed 2 tasks each

–Overview + Details: easy to use, helpful after a brief demo

–Users didn’t sort or edit columns, but when prompted had no problems guessing how to do it.

–Users were comfortable and familiar with tabbed nav, even within a tabbed web-browser.

–Placement of Suggestion Bar was problematic: users skipped directly to results, missing the Suggestion Bar.

Web IR / NLP Group @ NUS

Jesse Prabawa and Min-Yen Kan, Digital Libraries

822 June 2007 - JCDL (Session O)

Evaluation Results• Summative Evaluation (Feb 2007):

– 30 users performed 4 tasks each

– Overview + Details: 61% adoption rate on all four scenarios; 84% adoption rate for research/browsing scenario

– Table of results: 89% had no problems sorting results. 82% had not problems editing the columns.

– Tabs as a history mechanism: 77% noticed the tabs, out of which 52% only noticed after two tabs were visible

– Embedded Suggestion Bar: 60% noticed in the first encounter, 27% at the second time, and 10% at the third time. Only 3% did not notice at all.

Web IR / NLP Group @ NUS

Jesse Prabawa and Min-Yen Kan, Digital Libraries

922 June 2007 - JCDL (Session O)

Conclusion

• Key contributions:–Embedded multiple keyword-suggestions

–Overview + Details

–Tabs as history and parallel-search mechanism

–Rich table controls

• Timeline:–Prototype online at http://opac.comp.nus.edu.sg

–Deploying with metadata in July 2007

–Longer-term evaluation and rate of user acceptance

Jesse Prabawa and Min-Yen Kan, Digital Libraries

1022 June 2007 - JCDL (Session O)

End of Presentation

Backup Slides follow

Jesse Prabawa and Min-Yen Kan, Digital Libraries

1122 June 2007 - JCDL (Session O) 11Web IR / NLP Group @ NUS

User Interface Mockup

Jesse Prabawa and Min-Yen Kan, Digital Libraries

1222 June 2007 - JCDL (Session O) 12Web IR / NLP Group @ NUS

First working prototype

Jesse Prabawa and Min-Yen Kan, Digital Libraries

1322 June 2007 - JCDL (Session O) 13Web IR / NLP Group @ NUS

Second working prototype

Jesse Prabawa and Min-Yen Kan, Digital Libraries

1422 June 2007 - JCDL (Session O) 14Web IR / NLP Group @ NUS

Current Design