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Relevance Feedback: Assumptions

  • A1: User has sufficient knowledge for initial query.

  • A2: Relevance prototypes are “well-behaved”.

    • Term distribution in relevant documents will be similar

    • Term distribution in non-relevant documents will be different from those in relevant documents

      • Either: All relevant documents are tightly clustered around a single prototype.

      • Or: There are different prototypes, but they have significant vocabulary overlap.

      • Similarities between relevant and irrelevant documents are small


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