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Term: Affinity for retrieval Class:  
 vernacular   (0%)
Created 6 September 2013
Last modified 6 September 2013
Contributed by Muriel F.

Permalink:
  n2t.net/ark:/99152/h1038

Definition: For a collection (C) the Affinity for retrieval is the sum of the proportions of items (i) matching each query in its entirety (Mi) divided by the number of queries for which the collection had at least one item with a full match (q). The Af indicator is defined in an interval between 0 and 1.
The formula is defined in an article http://dx.doi.org/10.1016/j.ipm.2006.06.004
Examples: