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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 530477 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% /158062
women
 23.7% /140339

Origin of answers

Answers distribution by gender:

gender
men
52%
158062
women
48%
140339

Answers distribution by language:

language
Italian language
0%
299
German language
0%
5166
English language
5%
28729
Polish language
56%
299393
Russian language
0%
3099
Ukrainian language
0%
993
Polish language
36%
192798

Answers distribution by country:

country
flagPoland
94%
94%
502489
flagthe United States
2%
2%
11661
flagGermany
1%
1%
6393
flagIndia
0%
0%
4526
flagthe United Kingdom
0%
0%
4497
flagUkraine
0%
0%
1558
flagRussia
0%
0%
1524
flagAustralia
0%
0%
1139
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