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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 525384 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% /140180

Origin of answers

Answers distribution by gender:

gender
men
52%
157799
women
48%
140180

Answers distribution by language:

language
Italian language
0%
265
German language
0%
4652
English language
5%
28188
Polish language
56%
297046
Russian language
0%
3012
Ukrainian language
0%
991
Polish language
36%
191230

Answers distribution by country:

country
flagPoland
95%
95%
499374
flagthe United States
2%
2%
11236
flagGermany
1%
1%
5650
flagIndia
0%
0%
4460
flagthe United Kingdom
0%
0%
4261
flagUkraine
0%
0%
1547
flagRussia
0%
0%
1464
flagAustralia
0%
0%
1108
flagCanada
0%
0%
911
flagAustria
0%
0%
886

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