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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 524247 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% /157784
women
 23.6% /140124

Origin of answers

Answers distribution by gender:

gender
men
52%
157784
women
48%
140124

Answers distribution by language:

language
Italian language
0%
251
German language
0%
4614
English language
5%
28135
Polish language
56%
296443
Russian language
0%
2985
Ukrainian language
0%
984
Polish language
36%
190835

Answers distribution by country:

country
flagPoland
95%
95%
498514
flagthe United States
2%
2%
11197
flagGermany
1%
1%
5528
flagIndia
0%
0%
4457
flagthe United Kingdom
0%
0%
4239
flagUkraine
0%
0%
1541
flagRussia
0%
0%
1454
flagAustralia
0%
0%
1107
flagCanada
0%
0%
910
flagAustria
0%
0%
878

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