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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.

Parin, P. (1973). Der Beitrag ethno-psychoanalytischer Untersuchungen zur Aggressionstheorie. Psyche – Z Psychoanal., 27(3):237-248.

(1973). Psyche – Zeitschrift für Psychoanalyse, 27(3):237-248

Der Beitrag ethno-psychoanalytischer Untersuchungen zur Aggressionstheorie

Paul Parin

Die ethno-psychoanalytische Untersuchung der afrikanischen Dogon- und Agni-Kulturen lehrt, daß die psychoanalytische Aggressionstheorie eine kulturspezifische ist. Während die Libidotheorie kaum modifiziert werden mußte, ergaben sich für die metapsychologische Konzeption der Aggression, wie sie von Hartmann, Kris und Loewenstein (1949) entwickelt wurde, interessante Akzentverschiebungen. Bestätigt wurden vor allem die beiden grundlegenden Hypothesen, daß das Schicksal aggressiver Triebregungen durch die kulturspezifische Ausformung des Ichs bestimmt wird (das Es die Quelle, das Ich die formative Instanz der aggressiven Energie ist), und daß das soziale Verhalten der Menschen vorwiegend von aggressiven Energien unterhalten wird. Gruppen-Ich und Clan-Gewissen sind Modifikationen des abendländischen Ich- und Überich-Konzepts.

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