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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 457498 answers to questions in category optical illusions, given by players from 128 countries.
This test has questions in the following languages: English language, Polish language, Russian language, Italian language, German language, Ukrainian language and Polish language.

Results by country

Results by gender

men
 40.0% /154081
women
 22.8% /137481

Origin of answers

Answers distribution by gender:

gender
men
52%
154081
women
48%
137481

Answers distribution by language:

language
English language
4%
21518
Polish language
57%
263611
Russian language
0%
1080
Italian language
0%
28
German language
0%
936
Ukrainian language
0%
493
Polish language
37%
169832

Answers distribution by country:

country
flagPoland
97%
97%
447902
flagthe United States
2%
2%
9247
flagIndia
0%
0%
3138
flagthe United Kingdom
0%
0%
2794
flagGermany
0%
0%
1627
flagAustralia
0%
0%
824
flagUkraine
0%
0%
767
flagCanada
0%
0%
669
flagRussia
0%
0%
480
flagGreece
0%
0%
426

Quiz size

Number of active questions per language:

language
English language
23%
15
Polish language
21%
14
Russian language
9%
6
Italian language
1%
1
German language
17%
11
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