Toward Accessible Search T. V. Raman Google - - PowerPoint PPT Presentation

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Toward Accessible Search T. V. Raman Google - - PowerPoint PPT Presentation

Toward Accessible Search T. V. Raman Google http://emacspeak.sf.net/raman July 23, 2010 Toward Accessible Search 1 / 27 Overview Search The Core Value Of Search. Accessibility Accessibility And Search. Google Experiment:


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SLIDE 1

Toward Accessible Search 1 / 27

Toward Accessible Search

  • T. V. Raman

Google http://emacspeak.sf.net/raman

July 23, 2010

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SLIDE 2

Overview

Search Accessibility Google Mobile HCI Conclusion

Toward Accessible Search 2 / 27

The Core Value Of Search.

Accessibility And Search.

Experiment: Google Accessible Search.

Search And Ubiquitous Access.

Role Of Search In HCI.

Redefining accessible search.

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The Core Value Of Search

Search Core Value Of Search Effective Information Access Timely Information Access Relevant Information Access Accessibility Google Mobile HCI Conclusion

Toward Accessible Search 3 / 27

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Core Value Of Search

Search Core Value Of Search Effective Information Access Timely Information Access Relevant Information Access Accessibility Google Mobile HCI Conclusion

Toward Accessible Search 4 / 27

Effective, timely access to relevant information! Effective Ensure rapid task completion. Timely Deliver results as quickly as possible. Relevant Interpret query, and rank results.

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SLIDE 5

Effective Information Access

Search Core Value Of Search Effective Information Access Timely Information Access Relevant Information Access Accessibility Google Mobile HCI Conclusion

Toward Accessible Search 5 / 27

Metric: Task Completion

Interpret user intent,

Retrieve relevant information,

Present it effectively to enable task completion.

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SLIDE 6

Timely Information Access

Search Core Value Of Search Effective Information Access Timely Information Access Relevant Information Access Accessibility Google Mobile HCI Conclusion

Toward Accessible Search 6 / 27

Metric: Time to completion.

Return results as quickly as possible.

Return fresh information.

Present information to be immediately accessible.

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SLIDE 7

Relevant Information Access

Search Core Value Of Search Effective Information Access Timely Information Access Relevant Information Access Accessibility Google Mobile HCI Conclusion

Toward Accessible Search 7 / 27

Metric: Successful task completion.

Holy grail: perfect recall.

Effective search is an accessibility win.

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SLIDE 8

Accessibility And Search

Search Accessibility Accessibility Accessibility Challenges Serving User Needs Google Mobile HCI Conclusion

Toward Accessible Search 8 / 27

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Accessibility

Search Accessibility Accessibility Accessibility Challenges Serving User Needs Google Mobile HCI Conclusion

Toward Accessible Search 9 / 27

Serve users in the long tail! Information Retrieval Serve content in the long tail. Accessibility Serve users in the long tail. Goal: Rapid task completion.

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Accessibility Challenges

Search Accessibility Accessibility Accessibility Challenges Serving User Needs Google Mobile HCI Conclusion

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User interfaces for rapid task completion.

Adapt to user’s needs and abilities.

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SLIDE 11

Serving User Needs

Search Accessibility Accessibility Accessibility Challenges Serving User Needs Google Mobile HCI Conclusion

Toward Accessible Search 11 / 27

Serving users in the long tail:

Serve results so they are immediately usable.

Identify content that matches user’s needs.

Task at hand.

User interaction modality in use. Retrieve, format and serve result appropriately.

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SLIDE 12

Experiment: Google Accessible Search

Search Accessibility Google Google Accessible Search What We Built Delivering Accessible Search Lessons Learnt Accessible View Mobile HCI Conclusion

Toward Accessible Search 12 / 27

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Google Accessible Search

Search Accessibility Google Google Accessible Search What We Built Delivering Accessible Search Lessons Learnt Accessible View Mobile HCI Conclusion

Toward Accessible Search 13 / 27

Observations that led to Accessible Search:

Common queries, e.g., weather answered equally well by many Web documents.

Pick most appropriate result based on user’s access needs.

Success metric: Rapid task completion. Experiment: Use accessibility as a secondary metric.

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What We Built

Search Accessibility Google Google Accessible Search What We Built Delivering Accessible Search Lessons Learnt Accessible View Mobile HCI Conclusion

Toward Accessible Search 14 / 27

Identified a set of key HTML features to measure accessibility.

Built a linear classifier using these features.

Used standard machine learning techniques to tune the weights in the classifier. Classifier computed an accessibility score in the range [−1, 1]

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SLIDE 15

Delivering Accessible Search

Search Accessibility Google Google Accessible Search What We Built Delivering Accessible Search Lessons Learnt Accessible View Mobile HCI Conclusion

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Used accessibility metric as a secondary signal.

Launched Accessible Search as a CSE — Custom Search Engine.

Classifier continuously tuned based on user feedback and performance. Success Metric: Timely task completion.

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Lessons Learnt

Search Accessibility Google Google Accessible Search What We Built Delivering Accessible Search Lessons Learnt Accessible View Mobile HCI Conclusion

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Why Accessible Search remains a Labs experiment:

Met original goal of matching results to user’s needs.

Concept difficult to communicate to end-users.

Google search has always worked well for blind users.

Users reluctant to switch to a specialized result set. Consequence: Accessible Search is not used heavily.

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Accessible View

Search Accessibility Google Google Accessible Search What We Built Delivering Accessible Search Lessons Learnt Accessible View Mobile HCI Conclusion

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Efficient UI for rapid task completion.

Enables users to move through results with the keyboard.

Traverse result set as a continuous scroll.

Navigating results automatically speaks the snippet.

Pressing enter opens current result.

Keyboard access to advanced search tools including filters. Accessible Views is an opt-in UI experiment.

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Search And Ubiquitous Access

Search Accessibility Google Mobile Mobile Access Eyes-Free Android And Search HCI Conclusion

Toward Accessible Search 18 / 27

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Mobile Access

Search Accessibility Google Mobile Mobile Access Eyes-Free Android And Search HCI Conclusion

Toward Accessible Search 19 / 27

Challenge: Rapid task completion on mobile devices.

Format results to suit mobile displays.

Serve results that are optimized for small devices.

Augment with voice interaction. Mobile: Just a different access challenge!

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Eyes-Free Android And Search

Search Accessibility Google Mobile Mobile Access Eyes-Free Android And Search HCI Conclusion

Toward Accessible Search 20 / 27

1Vox —Your voice is my command!

Use voice search to input query.

Speak relevant information.

No context-switch.

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Role Of Search In HCI

Search Accessibility Google Mobile HCI Search And HCI Search And Eyes-Free Interaction What Is UI? Search In User Interfaces Conclusion

Toward Accessible Search 21 / 27

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Search And HCI

Search Accessibility Google Mobile HCI Search And HCI Search And Eyes-Free Interaction What Is UI? Search In User Interfaces Conclusion

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Accessibility: A band-width problem!

User’s attention span goes down.

User’s display size goes down.

User’s network band-width goes down. Search is crucial to effective human-computer interaction!

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Search And Eyes-Free Interaction

Search Accessibility Google Mobile HCI Search And HCI Search And Eyes-Free Interaction What Is UI? Search In User Interfaces Conclusion

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Visual displays optimized for rapid scanning.

Search essential for compensating in eyes-free interaction.

Every aspect of the user interface needs to be searchable! Search enables immediate random access!

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What Is UI?

Search Accessibility Google Mobile HCI Search And HCI Search And Eyes-Free Interaction What Is UI? Search In User Interfaces Conclusion

Toward Accessible Search 24 / 27

Application I O User data result intention attention

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Search In User Interfaces

Search Accessibility Google Mobile HCI Search And HCI Search And Eyes-Free Interaction What Is UI? Search In User Interfaces Conclusion

Toward Accessible Search 25 / 27

What is a user interface anyway?

Collect user input to interpret user intent.

Format response to capture user attention. Good Search = Light-weight User Interface

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Redefining Accessible Search

Search Accessibility Google Mobile HCI Conclusion Redefining Accessible Search Watch Access Take Off!

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Task completion remains the metric to optimize.

Accessibility is about tailoring the interface to match user needs.

Effective search is a means toward minimizing user interaction.

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Watch Access Take Off!

Search Accessibility Google Mobile HCI Conclusion Redefining Accessible Search Watch Access Take Off!

Toward Accessible Search 27 / 27