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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.

Giuliani, J. (2009). Uncommon Misery: Modern Psychoanalytic Perspectives on Infertility. J. Amer. Psychoanal. Assn., 57(1):215-226.

(2009). Journal of the American Psychoanalytic Association, 57(1):215-226

Panel Report

Uncommon Misery: Modern Psychoanalytic Perspectives on Infertility

Jack Giuliani

Harriet Wolfe, chair of the panel, introduced the topic under discussion as “a complex emotional experience … the unexpected discovery of infertility and the choices and events that follow upon it, an emotional experience that may have a uniquely disturbing quality, a truly uncommon misery.” She noted the relative lack of psychoanalytic investigation of this topic, despite the IPA panels held in 1997 and 1999. “With the exception of work by Roberta Apfel and Rheta Keylor, Nancy Chodorow, Sharon Zalusky, and Allison Rosen, the literature since the late 1990s is sparse.” She noted that our knowledge about infertility has changed, and that we now view the concept of “psychogenic infertility” as simplistic and anachronistic, since new technology can enable conception.

Wolfe thought that our new perspective, and the new technology, require an ongoing adaptation and integration in our thinking about infertility. She also felt that we are now challenged to integrate child and adult perspectives on infertility, and to better understand the nature of the desire to conceive, as well as of the pain of infertility and miscarriage. Our decisions for, and reactions to, either outcome have psychological and developmental implications.

[This is a summary or excerpt from the full text of the book or article. The full text of the document is available to subscribers.]

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