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%
21
flagUnknown
0%
2%
4%
91%
1004
flagNorway
0%
0%
5%
91%
34
flagSpain
0%
4%
4%
91%
23
flagGermany
0%
0%
8%
90%
183
flagDenmark
0%
9%
0%
90%
21
flagAustralia
0%
2%
9%
87%
41
flagPoland
1%
2%
7%
86%
15537
flagthe United Kingdom
1%
1%
7%
86%
406
flagItaly
0%
0%
14%
85%
27
flagRepublic of Ireland
4%
2%
10%
83%
48
flagthe United States
1%
3%
8%
81%
845
flagCanada
3%
1%
10%
81%
55
flagFrance
2%
6%
6%
81%
44
flagPakistan
0%
5%
5%
78%
19
flagUkraine
4%
4%
0%
77%
22
flagIndia
2%
3%
12%
75%
213
flagthe Netherlands
5%
5%
12%
72%
55
flagRussia
6%
3%
6%
72%
33
flagthe Philippines
0%
4%
9%
59%
22

Gender

men90%
women89%
10%
1%
0%
25%
2%
2%
50%
5%
7%
None
90%
89%

Details

Author: Steve Lamberty
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