How to improve the recall of an information retrieval system

How to improve the recall of an IR system, what are the different methods available to improve the search recall? State the global method and local method for effective recall.

Question:

How to increase recall in information retrieval?   Answer: Recall is the fraction of relevant documents that are retrieved. By modifying the initial query, we can improve the recall. This can be done as follows; 1. By adding new terms to the original query terms that are semantically related to the terms of the original query. This is referred as global method. 2. By making the query vector more similar to vectors of relevant documents. We need some indication of relevance either provided by the user or assumed by the model. This approach is referred as local method.

 

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Keywords

How to improve recall in information retrieval

Recall formula in information retrieval

How to evaluate information retrieval system

How to improve precision and recall

Information retrieval system evaluation

How do you evaluate an IR system

Improving the effectiveness of information retrieval system