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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 527898 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% /157932
women
 23.7% /140312

Origin of answers

Answers distribution by gender:

gender
men
52%
157932
women
48%
140312

Answers distribution by language:

language
Italian language
0%
288
German language
0%
4748
English language
5%
28449
Polish language
56%
298296
Russian language
0%
3063
Ukrainian language
0%
991
Polish language
36%
192063

Answers distribution by country:

country
flagPoland
94%
94%
501033
flagthe United States
2%
2%
11443
flagGermany
1%
1%
5885
flagIndia
0%
0%
4463
flagthe United Kingdom
0%
0%
4406
flagUkraine
0%
0%
1548
flagRussia
0%
0%
1492
flagAustralia
0%
0%
1116
flagCanada
0%
0%
911
flagAustria
0%
0%
896

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