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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 521483 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
 40.6% /157636
women
 23.6% /140104

Origin of answers

Answers distribution by gender:

gender
men
52%
157636
women
48%
140104

Answers distribution by language:

language
Italian language
0%
251
German language
0%
4516
English language
5%
27883
Polish language
56%
295052
Russian language
0%
2938
Ukrainian language
0%
971
Polish language
36%
189872

Answers distribution by country:

country
flagPoland
95%
95%
496539
flagthe United States
2%
2%
11034
flagGermany
0%
0%
5165
flagIndia
0%
0%
4419
flagthe United Kingdom
0%
0%
4225
flagUkraine
0%
0%
1527
flagRussia
0%
0%
1431
flagAustralia
0%
0%
1098
flagCanada
0%
0%
891
flagAustria
0%
0%
850

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