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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 525596 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% /157799
women
 23.6% /140183

Origin of answers

Answers distribution by gender:

gender
men
52%
157799
women
48%
140183

Answers distribution by language:

language
Italian language
0%
269
German language
0%
4664
English language
5%
28205
Polish language
56%
297151
Russian language
0%
3021
Ukrainian language
0%
991
Polish language
36%
191295

Answers distribution by country:

country
flagPoland
95%
95%
499510
flagthe United States
2%
2%
11246
flagGermany
1%
1%
5686
flagIndia
0%
0%
4460
flagthe United Kingdom
0%
0%
4262
flagUkraine
0%
0%
1547
flagRussia
0%
0%
1469
flagAustralia
0%
0%
1108
flagCanada
0%
0%
911
flagAustria
0%
0%
891

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