Observer effect

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Observer effect

Quality:

Observer effect - fact that simply observing a situation or phenomenon necessarily changes that phenomenon. Article “Observer effect” in Simple English Wikipedia has 16.8 points for quality (as of July 1, 2026). The article contains 3 references and 5 sections.

This article has the best quality in Korean Wikipedia. However, the most popular language version of this article is English.

Achievements in all the time:
Simple English Wikipedia:
The 3199th most popular in Simple English Wikipedia.

Since the creation of article “Observer effect”, its content was written by 19 registered users of Simple English Wikipedia and edited by 308 registered Wikipedia users in all languages.

The article is cited 14 times in Simple English Wikipedia and cited 165 times in all languages.

The highest Authors Interest rank from 2001:

  • Local (Simple English): #405 in March 2017
  • Global: #69126 in March 2020

The highest popularity rank from 2008:

  • Local (Simple English): #925 in September 2011
  • Global: #47746 in January 2021

There are 15 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, 2026 (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
1Korean (ko)
관측자 효과
23.6414
2English (en)
Observer effect (physics)
23.5269
3Chinese (zh)
观测者效应
22.8504
4Catalan (ca)
Efecte de l'observador (física)
21.5547
5Russian (ru)
Эффект наблюдателя
20.8907
6Portuguese (pt)
Efeito do observador
19.1286
7Simple English (simple)
Observer effect
16.8124
8Arabic (ar)
تأثير المراقب (الفيزياء)
16.3455
9Galician (gl)
Efecto do observador
14.7106
10Romanian (ro)
Efect de observator
10.9212
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 "Observer effect" in all the time
#LanguagePopularity awardRelative popularity
1English (en)
Observer effect (physics)
2 824 446
2Russian (ru)
Эффект наблюдателя
690 638
3Japanese (ja)
観察者効果
488 875
4Chinese (zh)
观测者效应
148 468
5Simple English (simple)
Observer effect
127 484
6Polish (pl)
Efekt obserwatora
81 714
7Portuguese (pt)
Efeito do observador
61 531
8Hebrew (he)
אפקט הצופה
58 791
9Persian (fa)
اثر مشاهده‌گر
54 830
10Hungarian (hu)
Megfigyelői hatás
26 217
More...

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

Most popular in June 2026

The most popular language versions of the article "Observer effect" in June 2026
#LanguagePopularity awardRelative popularity
1English (en)
Observer effect (physics)
12 682
2Russian (ru)
Эффект наблюдателя
3 380
3Japanese (ja)
観察者効果
909
4Chinese (zh)
观测者效应
699
5Persian (fa)
اثر مشاهده‌گر
273
6Polish (pl)
Efekt obserwatora
271
7Portuguese (pt)
Efeito do observador
202
8Hebrew (he)
אפקט הצופה
147
9Korean (ko)
관측자 효과
134
10Simple English (simple)
Observer effect
123
More...

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

The highest AI

Language versions of the article "Observer effect" with the highest Authors Interest (number of authors). Only registered Wikipedia users were taken into account.
#LanguageAI awardRelative AI
1English (en)
Observer effect (physics)
143
2Hebrew (he)
אפקט הצופה
39
3Russian (ru)
Эффект наблюдателя
25
4Simple English (simple)
Observer effect
19
5Hungarian (hu)
Megfigyelői hatás
18
6Japanese (ja)
観察者効果
17
7Chinese (zh)
观测者效应
10
8Polish (pl)
Efekt obserwatora
7
9Portuguese (pt)
Efeito do observador
7
10Romanian (ro)
Efect de observator
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 2026

Language versions of the article "Observer effect" with the highest AI in June 2026
#LanguageAI awardRelative AI
1Catalan (ca)
Efecte de l'observador (física)
1
2Korean (ko)
관측자 효과
1
3Arabic (ar)
تأثير المراقب (الفيزياء)
0
4English (en)
Observer effect (physics)
0
5Persian (fa)
اثر مشاهده‌گر
0
6Galician (gl)
Efecto do observador
0
7Hebrew (he)
אפקט הצופה
0
8Hungarian (hu)
Megfigyelői hatás
0
9Japanese (ja)
観察者効果
0
10Polish (pl)
Efekt obserwatora
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 "Observer effect" with the highest Citation Index (CI)
#LanguageCI awardRelative CI
1English (en)
Observer effect (physics)
41
2Japanese (ja)
観察者効果
27
3Simple English (simple)
Observer effect
14
4Russian (ru)
Эффект наблюдателя
13
5Chinese (zh)
观测者效应
13
6Hebrew (he)
אפקט הצופה
11
7Portuguese (pt)
Efeito do observador
9
8Arabic (ar)
تأثير المراقب (الفيزياء)
8
9Romanian (ro)
Efect de observator
8
10Persian (fa)
اثر مشاهده‌گر
7
More...

Scores

Estimated value for Wikipedia:
Simple English:
Global:
Popularity in June 2026:
Simple English:
Global:
Popularity in all years:
Simple English:
Global:
Authors in June 2026:
Simple English:
Global:
Registered authors in all years:
Simple English:
Global:
Citations:
Simple English:
Global:

Quality measures

Interwikis

#LanguageValue
arArabic
تأثير المراقب (الفيزياء)
caCatalan
Efecte de l'observador (física)
enEnglish
Observer effect (physics)
faPersian
اثر مشاهده‌گر
glGalician
Efecto do observador
heHebrew
אפקט הצופה
huHungarian
Megfigyelői hatás
jaJapanese
観察者効果
koKorean
관측자 효과
plPolish
Efekt obserwatora
ptPortuguese
Efeito do observador
roRomanian
Efect de observator
ruRussian
Эффект наблюдателя
simpleSimple English
Observer effect
zhChinese
观测者效应

Popularity rank trends

Best Rank Simple English:
#925
09.2011
Global:
#47746
01.2021

AI rank trends

Best Rank Simple English:
#405
03.2017
Global:
#69126
03.2020

Local popularity rank history

Local AI rank history

Languages comparison

Important global interconnections (July 2025 – June 2026)

Wikipedia readers most often find their way to information on Observer effect from Wikipedia articles about Observer, Uncertainty principle, Observer effect, Constellation and Quantum decoherence. Whereas reading the article about Observer effect people most often go to Wikipedia articles on Double-slit experiment, Observer, Schrödingers cat, Observer and Uncertainty principle.

Cumulative results of quality and popularity of the Wikipedia article

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

News from 1 July 2026

On 1 July 2026 in multilingual Wikipedia, Internet users most often read articles on the following topics: 2026 FIFA World Cup, Kylian Mbappé, Erling Haaland, Democratic Republic of the Congo, FIFA World Cup, Harry Kane, Romelu Lukaku, Senegal, Michael Olise, Sadio Mané.

In Simple English Wikipedia the most popular articles on that day were: List of European countries, Black, List of sex positions, 2026 Iran war, Suresh Raina, Politics of Germany, Academy Award for Best Director, 2020, DYSS-TV, 2022.

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 50 million Wikipedia articles in 55 languages. Quality scores of articles are based on Wikipedia dumps from July, 2026. When calculating current popularity and AI of articles data from June 2026 was taken into account. For historical values of popularity and AI WikiRank used data from 2001 to 2026... More information