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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 526717 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% /157859
women
 23.6% /140205

Origin of answers

Answers distribution by gender:

gender
men
52%
157859
women
48%
140205

Answers distribution by language:

language
Italian language
0%
286
German language
0%
4692
English language
5%
28316
Polish language
56%
297721
Russian language
0%
3046
Ukrainian language
0%
991
Polish language
36%
191665

Answers distribution by country:

country
flagPoland
94%
94%
500349
flagthe United States
2%
2%
11296
flagGermany
1%
1%
5776
flagIndia
0%
0%
4463
flagthe United Kingdom
0%
0%
4284
flagUkraine
0%
0%
1548
flagRussia
0%
0%
1480
flagAustralia
0%
0%
1113
flagCanada
0%
0%
911
flagAustria
0%
0%
892

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

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