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Tip: Understanding Rank

PEP-Web Tip of the Day

When you do a search, you can sort the results bibliographically alphabetical or by “rank”. What is Rank?

Rank refers to the search engine’s “best guess” as to the relevance of the result to the search you specified. The exact method of ranking used varies a bit depending on the search. In its most basic level, when you specify a single search term, rank looks at the density of the matches for the word in the document, and how close to the beginning of the document they appear as a measure of importance to the paper’s topic. The documents with the most matches and where the term is deemed to have the most importance, have the highest “relevance” and are ranked first (presented first).

When you specify more than one term to appear anywhere in the article, the method is similar, but the search engine looks at how many of those terms appear, and how close together they appear, how close to the beginning of the document, and can even take into account the relative rarity of the search terms and their density in the retrieved file, where infrequent terms count more heavily than common terms.

To see a simple example of this, search for the words (not the phrase, so no quotes):

unconscious communications

Look at the density of matches in each document on the first page of the hits. Then go to the last page of matched documents, and observe the density of matches within the documents.

A more complex search illustrates this nicely with a single page and only 15 matches:

counter*tr* w/25 “liv* out” w/25 enact*

There are a lot of word forms and variants of the words (due to the * wildcards) above that can match, but the proximity (w/25) clause limits the potential for matching. What’s interesting here though is how easily you can see the match density decrease as you view down the short list.

The end result of selecting order by rank is that the search engine’s best “guess” as to which articles are more relevant appear higher on the list than less relevant articles.

For the complete list of tips, see PEP-Web Tips on the PEP-Web support page.

Raymond, L. (2016). On: Letter from Boston. Int. J. Psycho-Anal., 97(1):177.

(2016). International Journal of Psycho-Analysis, 97(1):177

Letter to the Editor

On: Letter from Boston Related Papers

Laurie Raymond, M.D.

Dear Editor,

In the Letter from Boston (IJP 96(3):513-20, 2015) by Anton Kris, Ellen Pinsky, and Janet Noonan, there is a correction I would like to submit in its description of the PINE Psychoanalytic Center “functioning as a society without an ongoing institute.” While we do not yet know the direction of the PINE Psychoanalytic Center in future years, we are in fact at this time a functioning Society and Institute with ACPE Accreditation until 2017. We have 31 full faculty members including 4 training analysts, as well as 11 training analysts now at the Boston Psychoanalytic Society and Institute who can serve as training analysts for future candidates. We graduated two senior candidates this past June, and we have one senior candidate remaining who is likely to graduate in 2016. We have been in consultation with Dr Phil Lebovitz, Co-Chair of the APsaA Committee on Collaborative Institute Development (CCID) since June, 2014 for the maintaining of PINE.

Laurie Raymond MD

President

PINE Psychoanalytic Center, PO Box 920762, Needham, MA, 02492-0008, USA

E-mail: office@pineanalysis.org

[This is a summary excerpt from the full text of the journal article. The full text of the document is available to journal subscribers on the publisher's website here.]

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