Information Search Session 12

Course : T0593 / Human Computer InteractionYear : 2012

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Outline• Searching in Textual Documents and Database

Querying• Multimedia Document Searching• Advanced Filtering and Search Interfaces

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Information Search• Information search should be a joyous

experience, but it takes a skilled searcher with robust tools to perform an effective search

• Information retrieval and database management have evolved into:– information gathering, seeking, filtering,

collaborative filtering, sense-making, and visual analytics.

– data mining from data warehouses and data marts

– knowledge networks or semantic webs• All the above is complicated by the increased

volume of material to search

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Search terminology• Task actions are decomposed into browsing or

searching

• Here are some examples of task actions:- Specific fact finding (known-item search)

• Find the e-mail address of the President of the United States.

- Extended fact finding• What other books are by the author of “Jurassic

Park”?- Exploration of availability

• Is there new work on voice recognition in the ACM digital library?

- Open-ended browsing and problem analysis• Is there promising new research on fibromyalgia that

might help my patient?

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Searching in Textual Documentsand Database Querying

• Expert users can use SQL:SELECT DOCUMENT#FROM JOURNAL-DBWHERE (DATE >= 2004 AND DATE <= 2008)AND (LANGUAGE = ENGLISH OR FRENCH)AND (PUBLISHER = ASIST OR HFES OR ACM)

• SQL has powerful features, but it requires training• While SQL is a standard, form fill-in queries

have simplified query formulation

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Searching in Textual Documentsand Database Querying (cont.)

• Other methods include:- Natural language queries- Form fill-in- Query by example (QBE)

• Evidence shows that users perform better and have higher satisfaction when they can view and control the search

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Searching in Textual Documentsand Database Querying (cont.)

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Five-phase framework to clarify user interfaces for textual search

1. Formulation: expressing the search2. Initiation of action: launching the search3. Review of results: reading messages and

outcomes4. Refinement: formulating the next step5. Use: compiling or disseminating insight

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Searching in Textual Documentsand Database Querying (cont.)

As users press keys on the keypad (left figure), the digits are shown and a search isimplicitly initiated to display the list of names in the address book that match the

series of keys pressed. On the right figure, red wedges at the edge of the screen hintat the locations of off-screen results on a map (Gustafson)

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Multimedia Document Searches

1. Image search2. Map search3. Design or diagram search4. Sound search5. Video search6. Animation search

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Multimedia Document Searches (cont.)

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Advanced Filtering and Search Interfaces

1. Filtering with complex Boolean queries2. Automatic filtering3. Dynamic queries4. Faceted metadata search5. Query by example6. Implicit search7. Collaborative filtering8. Multilingual searches9. Visual field specification

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Supporting Materials• http://people.ischool.berkeley.edu/~

hearst/irbook/10/node9.html• http://

www.cs.umd.edu/projects/hcil/members/bshneiderman/ijhcs/main.html

Q & A

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