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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 439661 answers to questions in category optical illusions, given by players from 123 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
 39.7% /152768
women
 22.5% /136734

Origin of answers

Answers distribution by gender:

gender
men
52%
152768
women
48%
136734

Answers distribution by language:

language
English language
4%
19817
Polish language
57%
254243
Russian language
0%
697
Italian language
0%
7
German language
0%
539
Ukrainian language
0%
338
Polish language
37%
164020

Answers distribution by country:

country
flagPoland
98%
98%
433621
flagthe United States
1%
1%
8593
flagIndia
0%
0%
2799
flagthe United Kingdom
0%
0%
2547
flagGermany
0%
0%
1159
flagAustralia
0%
0%
687
flagCanada
0%
0%
596
flagUkraine
0%
0%
549
flagthe Philippines
0%
0%
373
flagRussia
0%
0%
322

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