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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.

Lorenz, E. (1913). 2. Aus einem Sch├╝lerheft. Internationale Zeitschrift für Psychoanalyse, 1(1):70-71.

(1913). Internationale Zeitschrift für Psychoanalyse, 1(1):70-71

2. Aus einem Schülerheft

Emil Lorenz

In einer den Schluß des 16. B. der Odyssee umfassenden schriftlichen Arbeit waren als letzte Verse die folgenden zu ühersetzen:

αὐτὰρ ἐπεὶ πóσɩοϛ ϰαὶ ἐδητύοϛ ἐξ ἔρον ἕντο,

ϰοίτου τε μνήσαντο ϰαὶ ὕπνου δῶρον ἕλοντο.

Das heißt richtig auf Deutach: Nachdem sie hierauf das Verlangen nach Trank und Speise gestillt hatten, dachten sie an die Nachtruhe und empfingen das Geschenk des Schlafes. Ein Schüler schrieb folgendes: … dachten sie an die Mutter (von ihm durchstrichen) Gemahlin und empfingen das Geschenk des Schlafes. Es ist das Wort ϰοῖτοϛ, bei dem er stolperte. Dasselbe ist nicht unbekannt gewesen unci bedeutet „das Liegen, Schlafen, die Nachtruhe“. Mit dem lateinischen Wort, das ich nicht hie herzusetzen brauche, hat es nur den Gleichklang gemein. Die Übersetzung „Gemahlin“ läßt sich erklären durch die Erinnerung an das stammverwandte ἄ-ϰοɩτɩϛ, das tatsächlich „Gemahlin“ bedeutet; das an erster Stelle stehende durchstrichene „Mutter“ ist aber damit in keiner Weise erklärt.

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