Wigner's friend

en

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Wigner's friend

Quality:

Wigner's friend - thought experiment in theoretical quantum physics. Article “Wigner's friend” in English Wikipedia has 47.4 points for quality (as of July 1, 2025). The article contains 34 references and 15 sections.

In this language version of Wikipedia the article has the best quality. Also, this article is the most popular in that (English) language version.

Since the creation of article “Wigner's friend”, its content was written by 119 registered users of English Wikipedia and edited by 288 registered Wikipedia users in all languages.

The article is cited 167 times in English Wikipedia and cited 350 times in all languages.

The highest Authors Interest rank from 2001:

  • Local (English): #7231 in March 2019
  • Global: #19389 in August 2002

The highest popularity rank from 2008:

  • Local (English): #57239 in March 2019
  • Global: #90785 in March 2019

There are 16 language versions for this article in the WikiRank database (of the considered 55 Wikipedia language editions).

The quality and popularity assessment was based on Wikipédia dumps from July 1, 2025 (including revision history and pageviews for previous years).

The table below shows the language versions of the article with the highest quality.

Languages with the highest quality

#LanguageQuality gradeQuality score
1English (en)
Wigner's friend
47.4175
2Korean (ko)
위그너의 친구
35.9614
3Russian (ru)
Друг Вигнера
34.9523
4Spanish (es)
Amigo de Wigner
30.3295
5Catalan (ca)
L'amic de Wigner
29.7989
6German (de)
Wigners Freund
28.0935
7Japanese (ja)
ウィグナーの友人
27.6412
8Hebrew (he)
חברו של ויגנר
25.7484
9French (fr)
Paradoxe de Wigner
21.9774
10Chinese (zh)
維格納的友人
17.3933
More...

The following table shows the most popular language versions of the article.

Most popular in all the time

The most popular language versions of the article "Wigner's friend" in all the time
#LanguagePopularity awardRelative popularity
1English (en)
Wigner's friend
658 876
2German (de)
Wigners Freund
98 490
3Italian (it)
Paradosso dell'amico di Wigner
67 515
4Japanese (ja)
ウィグナーの友人
37 967
5Polish (pl)
Przyjaciel Wignera
32 026
6Russian (ru)
Друг Вигнера
24 045
7French (fr)
Paradoxe de Wigner
23 083
8Portuguese (pt)
Amigo de Wigner
21 591
9Spanish (es)
Amigo de Wigner
16 158
10Chinese (zh)
維格納的友人
12 884
More...

The following table shows the language versions of the article with the highest popularity in the last month.

Most popular in June 2025

The most popular language versions of the article "Wigner's friend" in June 2025
#LanguagePopularity awardRelative popularity
1English (en)
Wigner's friend
5 521
2Japanese (ja)
ウィグナーの友人
1 086
3Russian (ru)
Друг Вигнера
608
4German (de)
Wigners Freund
278
5French (fr)
Paradoxe de Wigner
228
6Spanish (es)
Amigo de Wigner
200
7Italian (it)
Paradosso dell'amico di Wigner
148
8Chinese (zh)
維格納的友人
129
9Polish (pl)
Przyjaciel Wignera
101
10Portuguese (pt)
Amigo de Wigner
48
More...

The following table shows the language versions of the article with the highest Authors’ Interest.

The highest AI

Language versions of the article "Wigner's friend" with the highest Authors Interest (number of authors). Only registered Wikipedia users were taken into account.
#LanguageAI awardRelative AI
1English (en)
Wigner's friend
119
2German (de)
Wigners Freund
57
3Russian (ru)
Друг Вигнера
22
4Italian (it)
Paradosso dell'amico di Wigner
18
5French (fr)
Paradoxe de Wigner
13
6Portuguese (pt)
Amigo de Wigner
10
7Ukrainian (uk)
Парадокс Вігнера
10
8Polish (pl)
Przyjaciel Wignera
8
9Japanese (ja)
ウィグナーの友人
7
10Spanish (es)
Amigo de Wigner
6
More...

The following table shows the language versions of the article with the highest Authors’ Interest in the last month.

The highest AI in June 2025

Language versions of the article "Wigner's friend" with the highest AI in June 2025
#LanguageAI awardRelative AI
1German (de)
Wigners Freund
2
2Arabic (ar)
صديق ويغنر
0
3Catalan (ca)
L'amic de Wigner
0
4English (en)
Wigner's friend
0
5Spanish (es)
Amigo de Wigner
0
6French (fr)
Paradoxe de Wigner
0
7Hebrew (he)
חברו של ויגנר
0
8Italian (it)
Paradosso dell'amico di Wigner
0
9Japanese (ja)
ウィグナーの友人
0
10Korean (ko)
위그너의 친구
0
More...

The following table shows the language versions of the article with the highest number of citations.

The highest CI

Language versions of the article "Wigner's friend" with the highest Citation Index (CI)
#LanguageCI awardRelative CI
1English (en)
Wigner's friend
167
2French (fr)
Paradoxe de Wigner
125
3Japanese (ja)
ウィグナーの友人
12
4German (de)
Wigners Freund
10
5Spanish (es)
Amigo de Wigner
6
6Slovenian (sl)
Wignerjev prijatelj
6
7Portuguese (pt)
Amigo de Wigner
5
8Russian (ru)
Друг Вигнера
4
9Chinese (zh)
維格納的友人
4
10Italian (it)
Paradosso dell'amico di Wigner
3
More...

Scores

Estimated value for Wikipedia:
English:
Global:
Popularity in June 2025:
English:
Global:
Popularity in all years:
English:
Global:
Authors in June 2025:
English:
Global:
Registered authors in all years:
English:
Global:
Citations:
English:
Global:

Quality measures

Interwikis

#LanguageValue
arArabic
صديق ويغنر
caCatalan
L'amic de Wigner
deGerman
Wigners Freund
enEnglish
Wigner's friend
esSpanish
Amigo de Wigner
frFrench
Paradoxe de Wigner
heHebrew
חברו של ויגנר
itItalian
Paradosso dell'amico di Wigner
jaJapanese
ウィグナーの友人
koKorean
위그너의 친구
plPolish
Przyjaciel Wignera
ptPortuguese
Amigo de Wigner
ruRussian
Друг Вигнера
slSlovenian
Wignerjev prijatelj
ukUkrainian
Парадокс Вігнера
zhChinese
維格納的友人

Popularity rank trends

Best Rank English:
#57239
03.2019
Global:
#90785
03.2019

AI rank trends

Best Rank English:
#7231
03.2019
Global:
#19389
08.2002

Local AI rank history

Languages comparison

Important global interconnections (July 2024 – June 2025)

Wikipedia readers most often find their way to information on Wigner's friend from Wikipedia articles about Quantum mechanics, Schrödingers cat, Many-worlds interpretation, Thought experiment and Eugene Wigner. Whereas reading the article about Wigner's friend people most often go to Wikipedia articles on Schrödingers cat, Eugene Wigner, Copenhagen interpretation, Quantum immortality and Measurement problem.

Cumulative results of quality and popularity of the Wikipedia article

List of Wikipedia articles in different languages (starting with the most popular):

News from 16 March 2026

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In English Wikipedia the most popular articles on that day were: 98th Academy Awards, Michael B. Jordan, Paul Thomas Anderson, Jessie Buckley, Sinners (2025 film), Amy Madigan, Autumn Durald Arkapaw, Maya Rudolph, Sean Penn, Academy Awards.

About WikiRank

The WikiRank project is intended for automatic relative evaluation of the articles in the various language versions of Wikipedia. At the moment the service allows to compare over 44 million Wikipedia articles in 55 languages. Quality scores of articles are based on Wikipedia dumps from July, 2025. When calculating current popularity and AI of articles data from June 2025 was taken into account. For historical values of popularity and AI WikiRank used data from 2001 to 2025... More information