Which line is the longest?

A
B
C
All are the same
This illusion has a long research history. It seems that people living in ur­ban­ized areas perceive the lines as rep­re­sent­ing the corners of rec­ti­lin­ear objects viewed in per­spec­tive, being more sus­cep­ti­ble to illusion than people from rural areas.

Answers distribution

A
B
C
All are the same
answers
flagItaly
2%
4%
0%
93%
45
flagthe United Arab Emirates
2%
2%
0%
92%
39
flagFinland
0%
9%
0%
90%
21
flagSwitzerland
0%
5%
2%
89%
39
flagthe Netherlands
0%
10%
1%
88%
77
flagSpain
4%
8%
0%
87%
24
flagPoland
2%
8%
1%
86%
21022
flagUnknown
4%
6%
1%
86%
1462
flagFrance
0%
8%
3%
86%
58
flagNorway
0%
11%
0%
86%
44
flagthe United States
4%
7%
2%
84%
936
flagthe United Kingdom
3%
8%
2%
84%
541
flagAustralia
2%
10%
4%
84%
50
flagSweden
6%
3%
3%
84%
33
flagGermany
3%
10%
2%
81%
267
flagCanada
1%
16%
1%
80%
68
flagRepublic of Ireland
4%
16%
4%
73%
67
flagIndia
11%
12%
2%
69%
234
flagDenmark
3%
25%
3%
67%
28
flagthe Philippines
26%
11%
5%
50%
34

Gender

men88%
women90%
A
3%
1%
B
6%
6%
C
1%
1%
All are the same
88%
90%

Language versions

question
answers
results
flag
Which line is the longest?
1907
80%

Details

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