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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 527120 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% /157902
women
 23.6% /140237

Origin of answers

Answers distribution by gender:

gender
men
52%
157902
women
48%
140237

Answers distribution by language:

language
Italian language
0%
286
German language
0%
4714
English language
5%
28372
Polish language
56%
297912
Russian language
0%
3051
Ukrainian language
0%
991
Polish language
36%
191794

Answers distribution by country:

country
flagPoland
94%
94%
500623
flagthe United States
2%
2%
11343
flagGermany
1%
1%
5801
flagIndia
0%
0%
4463
flagthe United Kingdom
0%
0%
4324
flagUkraine
0%
0%
1548
flagRussia
0%
0%
1482
flagAustralia
0%
0%
1116
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