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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 518127 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% /157445
women
 23.5% /139939

Origin of answers

Answers distribution by gender:

gender
men
52%
157445
women
48%
139939

Answers distribution by language:

language
Italian language
0%
232
German language
0%
4304
English language
5%
27571
Polish language
56%
293420
Russian language
0%
2796
Ukrainian language
0%
930
Polish language
36%
188874

Answers distribution by country:

country
flagPoland
95%
95%
494032
flagthe United States
2%
2%
10904
flagGermany
0%
0%
4998
flagIndia
0%
0%
4385
flagthe United Kingdom
0%
0%
4143
flagUkraine
0%
0%
1465
flagRussia
0%
0%
1367
flagAustralia
0%
0%
1084
flagCanada
0%
0%
864
flagAustria
0%
0%
830

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