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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.

Perelberg, R.J. (1993). The Psychoanalytic Treatment of Young Adults as a Rite of Passage: Discussion of the Conference. Bul. Anna Freud Centre, 16(1):95-103.

(1993). Bulletin of the Anna Freud Centre, 16(1):95-103

The Psychoanalytic Treatment of Young Adults as a Rite of Passage: Discussion of the Conference

Rosine Jozef Perelberg

This was a rich and thought-provoking day of discussions. Presenting an accurate account of all the important points raised in the papers and the discussions is an impossible task, so I have selected just four main areas. I will briefly present the first, which is the research format itself, and will then discuss in more detail three themes which are of conceptual and clinical relevance.

The four main themes discussed throughout the Conference were:

1.   the research format;

2.   the question of what is specific to young adults, as opposed to older adults and even adolescents;

3.   the importance of the attachment to the ‘preoedipal mother’;

4.   the role of the analyst.

1.   The Research Format

In their paper Professor Fonagy and Dr Tallandini-Shallice outlined the format of the research project. They first pointed out the methodological problems in researching the regularities of the psychoanalytic process without distorting the procedure under observation. This difficulty has been one of the factors leading to the confusion between facts and interpretations in psychoanalysis, whereby psychoanalysts have tended to use arguments of authority to justify their theories.


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