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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 530732 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% /158072
women
 23.7% /140372

Origin of answers

Answers distribution by gender:

gender
men
52%
158072
women
48%
140372

Answers distribution by language:

language
Italian language
0%
300
German language
0%
5170
English language
5%
28793
Polish language
56%
299491
Russian language
0%
3107
Ukrainian language
0%
993
Polish language
36%
192878

Answers distribution by country:

country
flagPoland
94%
94%
502653
flagthe United States
2%
2%
11692
flagGermany
1%
1%
6408
flagIndia
0%
0%
4537
flagthe United Kingdom
0%
0%
4502
flagUkraine
0%
0%
1558
flagRussia
0%
0%
1524
flagAustralia
0%
0%
1141
flagCanada
0%
0%
912
flagAustria
0%
0%
911

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