Which area is brighter?

A
B
Both are the same
It depends on the order of seeing
This is the well known checker shadow illusion, first published in 1995 by Edward H. Adelson, Professor of Vision Science at MIT. The area A appears darker because of its light surrounding. At the same time, area B, surrounded with dark areas, appear lighter.
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Answers by country

A
B
Both are the same
It depends on the order of seeing
answers
flagBelarus
9%
9%
81%
0%
11
flagthe United States
8%
4%
76%
9%
643
flagCanada
12%
4%
75%
4%
41
flagthe Philippines
13%
3%
72%
6%
29
flagAustralia
17%
2%
71%
6%
45
flagGermany
8%
14%
70%
7%
70
flagthe Netherlands
0%
0%
70%
10%
10
flagPoland
8%
13%
69%
7%
17075
flagthe United Kingdom
13%
9%
67%
7%
144
flagMalaysia
25%
0%
66%
8%
12
flagUkraine
10%
16%
63%
10%
80
flagIndonesia
18%
0%
63%
18%
11
flagAustria
0%
18%
63%
18%
11
flagIndia
11%
9%
58%
17%
210
flagRussia
6%
19%
57%
14%
47
flagUnknown
21%
5%
42%
31%
19
flagSouth Africa
60%
0%
40%
0%
10
flagPakistan
10%
10%
40%
40%
10
flagthe United Arab Emirates
20%
30%
40%
10%
10