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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 528915 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% /157969
women
 23.7% /140319

Origin of answers

Answers distribution by gender:

gender
men
52%
157969
women
48%
140319

Answers distribution by language:

language
Italian language
0%
297
German language
0%
4797
English language
5%
28574
Polish language
56%
298790
Russian language
0%
3088
Ukrainian language
0%
991
Polish language
36%
192378

Answers distribution by country:

country
flagPoland
94%
94%
501643
flagthe United States
2%
2%
11547
flagGermany
1%
1%
5990
flagIndia
0%
0%
4506
flagthe United Kingdom
0%
0%
4448
flagUkraine
0%
0%
1557
flagRussia
0%
0%
1522
flagAustralia
0%
0%
1117
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