| Term: | Affinity for retrieval |
| 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 |