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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 523873 answers to questions in category optical illusions, given by players from 142 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% /157757
women
 23.6% /140122

Origin of answers

Answers distribution by gender:

gender
men
52%
157757
women
48%
140122

Answers distribution by language:

language
Italian language
0%
251
German language
0%
4586
English language
5%
28109
Polish language
56%
296246
Russian language
0%
2979
Ukrainian language
0%
980
Polish language
36%
190722

Answers distribution by country:

country
flagPoland
95%
95%
498259
flagthe United States
2%
2%
11181
flagGermany
1%
1%
5455
flagIndia
0%
0%
4457
flagthe United Kingdom
0%
0%
4239
flagUkraine
0%
0%
1537
flagRussia
0%
0%
1452
flagAustralia
0%
0%
1107
flagCanada
0%
0%
909
flagAustria
0%
0%
859

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