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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.

Joffe, W.G. Sandler, J. Baker, S. Edgcumbe, R. Kawenoka, M. Kennedy, H. Neurath **, L. (1968). Algunos problemas conceptuales en la consideraci√≥n de los trastornos del narcisismo. Rev. psicoanál., 25(2):371-386.

(1968). Revista de Psicoanálisis, 25(2):371-386

Algunos problemas conceptuales en la consideración de los trastornos del narcisismo

W. G. Joffe, Joseph Sandler, Sheila Baker, Rose Edgcumbe, María Kawenoka, Hanna Kennedy y Lily Neurath **

En diversos campos de actividad dentro de la Hampstead Clinic, numerosos grupos dedicados a la investigación se han propuesto lograr un refinamiento progresivo de los conceptos psicoanalíticos en lo relativo a su aplicación al material clínico. En particular, el índice sistemático del material clínico psicoanalítico (Sandler, 1962) y la aplicación rutinaria del perfil diagnóstico de Anna Freud (Anna Freud, 1963), han servido para poner de manifiesto problemas relacionados con nuestras herramientas conceptuales destinadas a evaluar los que, en términos generales, podrían llamarse “trastornos del narcisismo”.

En el campo del psicoanálisis se presta cada vez más atención a la evaluación y al tratamiento de los “trastornos del narcisismo”, tanto en niños como en adultos. Si bien Freud empleó originariamente dicho término (1923) para referirse a las psicosis, hoy se lo aplica a una gama mucho más amplia de variados trastornos clínicos, que reflejan serias perturbaciones en las actitudes frente al Self y en la regulación del bienestar y la autoestima. Dichos trastornos, que incluyen reacciones depresivas tanto en niños como en adultos, revelan a través de su patología no sólo la existencia de un conflicto relacionado con la descarga impulsiva, sino también una seria perturbación yoica intrasistémica, vinculada con el mantenimiento de las relaciones Self-objeto y los problemas de autoestima e identidad.

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