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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 476632 answers to questions in category optical illusions, given by players from 130 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
 40.2% /155432
women
 23.1% /138478

Origin of answers

Answers distribution by gender:

gender
men
52%
155432
women
48%
138478

Answers distribution by language:

language
English language
4%
23550
Polish language
57%
273489
Russian language
0%
1355
Italian language
0%
59
German language
0%
1499
Ukrainian language
0%
645
Polish language
36%
176035

Answers distribution by country:

country
flagPoland
97%
97%
463064
flagthe United States
2%
2%
9691
flagIndia
0%
0%
3542
flagthe United Kingdom
0%
0%
3340
flagGermany
0%
0%
2364
flagUkraine
0%
0%
1009
flagAustralia
0%
0%
977
flagCanada
0%
0%
695
flagRussia
0%
0%
588
flagGreece
0%
0%
482

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