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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.

Fischer, R.S. (2002). Prologue. Psychoanal. Inq., 22(2):165-169.

(2002). Psychoanalytic Inquiry, 22(2):165-169

Prologue

Ruth S. Fischer, M.D.

Psychoanalytic Interest in Human Sexuality Dates Back to the very beginning of psychoanalysis itself. Freud's earliest theory of psychosexual development identified three components of sexuality: sexual zone, aim, and object. The investigation into homosexuality began with the observation that the object, being the last of the components established, was the least fixed. Numerous articles addressed the phenomenon of homosexuality. Several specifically focused on female homosexuality. As efforts were made to understand the etiology, attention was directed toward the child's relationships with the parents. A constellation of overinvolvement of one parent with a lack of involvement of the other became the stereotypic family configuration that resulted in homosexuality in the child. At first, a skewed oedipal conflict resolution was considered the central factor. Later, preoedipal issues were considered determinative. More recently, male-female differences have become a focus of interest and efforts are being made to investigate lesbianism as a separate entity from male homosexuality. Increasingly, the lesbian voice is being heard.

Psychoanalytic theory has been evolving. It is not a static science. Ego psychology, object relations, self psychology, developmental theory, ideas about attunement and resonance, biologic givens, environmental impact, and sexual variation have been added to drive theory. Unfortunately, our understanding of lesbianism has not kept pace with our theoretical evolution. First, we needed to develop a new psychoanalytic understanding of female psychology and to appreciate male-female differences in constitutional givens, sexual and aggressive drive endowment, psychosexual development, and the development of object relations. We have begun to explore the importance of body sensations and body comparisons woman to woman as well as female to male.

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