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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.

Freud, S. (1913). ZUR EINLEITUNG DER BEHANDLUNG. GESAMMELTE WERKE: VIII, 454-478.

Freud, S. (1913). [GWH454a1]ZUR EINLEITUNG DER BEHANDLUNG. GESAMMELTE WERKE: VIII, 454-478

[GWH454a1]ZUR EINLEITUNG DER BEHANDLUNG Book Information Previous Up Next Language Translation

Sigm. Freud

[GWH454a2]Wer das edle Schachspiel aus Büchern erlernen will, der wird bald erfahren, daß nur die Eröffnungen und Endspiele eine erschöpfende systematische Darstellung gestatten, während die unübersehbare Mannigfaltigkeit der nach der Eröffnung beginnenden Spiele sich einer solchen versagt. Eifriges Studium von Partien, in denen Meister miteinander gekämpft haben, kann allein die Lücke in der Unterweisung ausfüllen. Ähnlichen Einschränkungen unterliegen wohl die Regeln, die man für die Ausübung der psychoanalytischen Behandlung geben kann.

[GWH454a3]Ich werde im folgenden versuchen, einige dieser Regeln für die Einleitung der Kur zum Gebrauche des praktischen Analytikers zusammenzustellen. Es sind Bestimmungen darunter, die kleinlich erscheinen mögen und es wohl auch sind. Zu ihrer Entschuldigung diene, daß es eben Spielregeln sind, die ihre Bedeutung aus dem Zusammenhange des Spielplanes schöpfen müssen. Ich tue aber gut daran, diese Regeln als “Ratschläge” auszugeben und keine unbedingte Verbindlichkeit für sie zu beanspruchen.

[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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