For the cases where retrieval took place , we used F-score ( van Rijsbergen 1979 ; Salton and McGill 1983 ) to determine the similarity between the response from the top-ranked document and the real response ( the formulas for F-score and its contributing factors , recall and precision , appear in Section 4.2 ) .
an introduction to modern information retrieval
G Salton M J McGill
We see that matching on requests yields more retrieved documents than matching on responses , and that matching on request -- response pairs yields even more retrieved documents . For the cases where retrieval took place , we used F-score ( van Rijsbergen 1979 ; Salton and McGill 1983 ) to determine the similarity between the response from the top-ranked document and the real response ( the formulas for F-score and its contributing factors , recall and precision , appear in Section 4.2 ) . The third column in Table 1 shows the proportion of requests for which this similarity is non-zero .
For the cases where retrieval took place , we used F-score ( van Rijsbergen 1979 ; @@CITATION ) to determine the similarity between the response from the top-ranked document and the real response ( the formulas for F-score and its contributing factors , recall and precision , appear in Section 4.2 ) .