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Table 8 Effectiveness of Boolean retrieval approaches: un-ordered documents using original and simplified Boolean queries (Ovid).

From: Boolean versus ranked querying for biomedical systematic reviews

 

Level

Precision

recall

Boolean

Tier 1

0.0282

0.2656

(Orig)

Tier 2

0.0121

0.2853

Boolean

Tier 1

0.0130

0.7904

(Simp)

Tier 2

0.0058

0.8209