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
flagMalaysia
0%
6%
0%
93%
16
flagthe United Arab Emirates
0%
3%
0%
92%
26
flagUnknown
4%
4%
0%
91%
73
flagItaly
3%
6%
0%
90%
31
flagSpain
5%
5%
0%
90%
20
flagFrance
0%
6%
2%
88%
45
flagFinland
0%
11%
0%
88%
18
flagCzech Republic
0%
11%
0%
88%
17
flagthe Netherlands
0%
10%
2%
86%
46
flagNorway
0%
13%
0%
86%
30
flagPoland
2%
9%
1%
85%
12782
flagthe United States
4%
7%
1%
84%
865
flagthe United Kingdom
3%
9%
1%
84%
425
flagGermany
2%
8%
3%
83%
184
flagCanada
1%
15%
0%
82%
63
flagAustralia
2%
13%
2%
81%
37
flagRepublic of Ireland
5%
17%
1%
73%
52
flagIndia
11%
11%
3%
71%
199
flagDenmark
4%
23%
4%
66%
21
flagthe Philippines
27%
6%
6%
55%
29

Gender

men88%
women89%
A
3%
1%
B
6%
7%
C
1%
1%
All are the same
88%
89%

Language versions

question
answers
results
flag
Which line is the longest?
1667
81%

Details

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