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Interaction Strategies for Effective Search Results Selection

Learn about query formulation, snippet selection, and result set examination in traditional concordance web search engines. Understand the difference between indicative and informative abstracts and their role in information selection. Explore extraction-based summarization techniques for generating concise summaries.

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Interaction Strategies for Effective Search Results Selection

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  1. Interaction LBSC 734 Module 4 Doug Oard

  2. Agenda • Where interaction fits • Query formulation • Selection part 1: Snippets • Selection part 2: Result sets • Examination

  3. A Traditional Concordance

  4. Web Search Engine Snippets:“KeyWord In Context” (KWIC) Query: University of Maryland College Park

  5. Summarization

  6. Indicative vs. Informative • Indicative abstracts support selection • They describe the contents of a document • Informative abstracts support understanding • They summarize the contents of a document • Applies to any information presentation • Presented for indicative or informative purposes

  7. Selection/Examination Tasks • “Indicative” tasks • Recognizing what you are looking for • Determining that no answer exists in a source • Probing to refine mental models of system operation • “Informative” tasks • Vocabulary acquisition • Concept learning • Information use

  8. Extraction-Based Summarization • Robust technique for making disfluent summaries • Four broad types: • Query-biased vs. generic • Term-oriented vs. sentence-oriented • Combine evidence for selection: • Salience: similarity to the query • Specificity: IDF or chi-squared, … • Emphasis: title, first sentence, … Jimmy Lin, et al..INTERACT 2003.

  9. Agenda • Where interaction fits • Query formulation • Selection part 1: Snippets • Selection part 2: Result sets • Examination

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