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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 528598 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% /157967
women
 23.7% /140314

Origin of answers

Answers distribution by gender:

gender
men
52%
157967
women
48%
140314

Answers distribution by language:

language
Italian language
0%
292
German language
0%
4770
English language
5%
28529
Polish language
56%
298650
Russian language
0%
3080
Ukrainian language
0%
991
Polish language
36%
192286

Answers distribution by country:

country
flagPoland
94%
94%
501456
flagthe United States
2%
2%
11515
flagGermany
1%
1%
5967
flagIndia
0%
0%
4475
flagthe United Kingdom
0%
0%
4436
flagUkraine
0%
0%
1552
flagRussia
0%
0%
1520
flagAustralia
0%
0%
1116
flagCanada
0%
0%
911
flagAustria
0%
0%
910

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