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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 526588 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% /157851
women
 23.6% /140198

Origin of answers

Answers distribution by gender:

gender
men
52%
157851
women
48%
140198

Answers distribution by language:

language
Italian language
0%
282
German language
0%
4690
English language
5%
28292
Polish language
56%
297659
Russian language
0%
3043
Ukrainian language
0%
991
Polish language
36%
191631

Answers distribution by country:

country
flagPoland
95%
95%
500261
flagthe United States
2%
2%
11288
flagGermany
1%
1%
5766
flagIndia
0%
0%
4462
flagthe United Kingdom
0%
0%
4279
flagUkraine
0%
0%
1548
flagRussia
0%
0%
1478
flagAustralia
0%
0%
1109
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