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Global Optical Illusions Knowledge Test

Since 2013, we have been measuring the global knowledge about optical illusions through the online quiz game.
The results are based on 529627 answers to questions in category optical illusions, given by players from 143 countries.
This test has questions in the following languages: Italian language, German language, English language, Polish language, Russian language, Ukrainian language and Polish language.

Results by country

Results by gender

men
 40.7% /157986
women
 23.7% /140335

Origin of answers

Answers distribution by gender:

gender
men
52%
157986
women
48%
140335

Answers distribution by language:

language
Italian language
0%
299
German language
0%
4833
English language
5%
28667
Polish language
56%
299128
Russian language
0%
3099
Ukrainian language
0%
993
Polish language
36%
192608

Answers distribution by country:

country
flagPoland
94%
94%
502141
flagthe United States
2%
2%
11619
flagGermany
1%
1%
6031
flagIndia
0%
0%
4514
flagthe United Kingdom
0%
0%
4481
flagUkraine
0%
0%
1558
flagRussia
0%
0%
1524
flagAustralia
0%
0%
1132
flagCanada
0%
0%
912
flagAustria
0%
0%
911

Quiz size

Number of active questions per language:

language
Italian language
1%
1
German language
17%
11
English language
23%
15
Polish language
21%
14
Russian language
9%
6
Ukrainian language
9%
6
Polish language
17%
11

The results are released under the CC-attribution license.

You may freely use it and re-distribute, but you must provide the link back to this page