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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 529725 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% /157991
women
 23.7% /140337

Origin of answers

Answers distribution by gender:

gender
men
52%
157991
women
48%
140337

Answers distribution by language:

language
Italian language
0%
299
German language
0%
4834
English language
5%
28687
Polish language
56%
299174
Russian language
0%
3099
Ukrainian language
0%
993
Polish language
36%
192639

Answers distribution by country:

country
flagPoland
94%
94%
502202
flagthe United States
2%
2%
11633
flagGermany
1%
1%
6044
flagIndia
0%
0%
4520
flagthe United Kingdom
0%
0%
4481
flagUkraine
0%
0%
1558
flagRussia
0%
0%
1524
flagAustralia
0%
0%
1136
flagCanada
0%
0%
912
flagAustria
0%
0%
911

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