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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 525734 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
 40.7% /157824
women
 23.6% /140183

Origin of answers

Answers distribution by gender:

gender
men
52%
157824
women
48%
140183

Answers distribution by language:

language
Italian language
0%
272
German language
0%
4667
English language
5%
28220
Polish language
56%
297220
Russian language
0%
3031
Ukrainian language
0%
991
Polish language
36%
191333

Answers distribution by country:

country
flagPoland
95%
95%
499607
flagthe United States
2%
2%
11247
flagGermany
1%
1%
5698
flagIndia
0%
0%
4460
flagthe United Kingdom
0%
0%
4262
flagUkraine
0%
0%
1547
flagRussia
0%
0%
1473
flagAustralia
0%
0%
1108
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

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