How many dots at the intersections are black?

10%
25%
50%
None
In this scin­til­lat­ing grid il­lu­sion, dark dots seem to appear and dis­ap­pear ran­dom­ly. Various theories have been proposed to explain it. It may be caused by the mech­a­nism of lateral in­hi­bi­tion (the capacity of an excited neuron to reduce the activity of its neigh­bors).

Answers distribution

10%
25%
50%
None
answers
flagthe United Arab Emirates
0%
0%
0%
100%
18
flagSpain
0%
5%
0%
94%
19
flagGermany
0%
0%
9%
88%
135
flagAustralia
0%
2%
8%
88%
36
flagNorway
0%
0%
7%
88%
27
flagDenmark
0%
11%
0%
88%
18
flagPoland
1%
3%
7%
85%
10602
flagthe United Kingdom
1%
2%
7%
85%
340
flagFrance
0%
5%
8%
85%
34
flagItaly
0%
0%
16%
83%
24
flagRepublic of Ireland
4%
2%
11%
81%
43
flagthe United States
1%
3%
8%
80%
806
flagCanada
4%
2%
12%
78%
47
flagPakistan
0%
5%
5%
77%
18
flagUnknown
5%
5%
11%
76%
34
flagMalaysia
0%
5%
11%
76%
17
flagIndia
2%
3%
13%
74%
192
flagRussia
0%
4%
8%
72%
25
flagthe Netherlands
0%
7%
15%
71%
39
flagthe Philippines
0%
0%
10%
65%
20

Gender

men88%
women88%
10%
1%
0%
25%
3%
2%
50%
6%
8%
None
88%
88%

Details

Author: Steve Lamberty
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