OvidSP: Relevancy Ranking of Results Records
How OvidSP Calculates Relevancy Ranking
When you run a search from the Basic Search tab, OvidSP uses natural language processing (NLP) to retrieve results. In the Search Results Display, OvidSP ranks Basic Search results records by relevancy to the query that produced them.
Only the records from Basic Search results
get relevancy ranked.
By default, OvidSP lists best-ranked records first in the display, providing a visual qualification of each record's relevance to your search term(s).
All search concepts are present and complete.
All search concepts are present, but some are incomplete.
One concept is missing from the record.
Two concepts are missing from the record.
More than two search concepts are missing from the record.
OvidSP ranks records in the results display based upon the following criteria.
| Count | How many search concepts appear in the record. |
| Frequency | How often concepts occur in the record. |
| Importance | How rare the terms are in the database. |
| Cohesion | Whether or not terms within phrases occur closely together. |
| Vocabulary Level | Closeness of a record's language to your word choices rather than to variants and synonyms. |
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