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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.

Katz, A.W. (2000). Psychic Reality And Psychic Change: A Therapeutic Journey. Psychoanal. Rev., 87(1):81-100.

(2000). Psychoanalytic Review, 87(1):81-100

Psychic Reality And Psychic Change: A Therapeutic Journey

Anita Weinreb Katz, Ph.D.

Tell all the Truth but tell it slant-Success

in Circuit lies

Too bright for our infirm Delight

The Truth's superb surprise

As Lightning to the Children eased

With explanation kind

The Truth must dazzle gradually

Or every man be blind—

—Emily Dickinson

In this article the Australian film Proof (1992), directed by Jocelyn Moorehouse, is used to study the psychic reality of a 32-year-old blind man, as well as to study how it developed in a particular way, and how it changed (that is, how he changed). I view unconscious beliefs, perceptions, and behavior as parallel processes, determining both the choice of love object and the way of relating to that object. The internal drama is repeated and lived out in external relationships. In this film the struggle for growth and development inevitably lead the protagonist to find a person who helps him resume his blocked development. The film affords an avenue to understand the subject's affect and intrapsychic conflict, and how it plays out in seeking safety, pleasure, and power in interpersonal relationships.

[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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