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%
20
flagUnknown
0%
2%
5%
91%
953
flagSpain
0%
4%
4%
91%
23
flagNorway
0%
0%
6%
90%
33
flagDenmark
0%
9%
0%
90%
21
flagGermany
0%
0%
8%
89%
169
flagAustralia
0%
2%
10%
87%
39
flagPoland
1%
2%
7%
86%
14834
flagthe United Kingdom
1%
1%
7%
86%
396
flagItaly
0%
0%
15%
84%
26
flagRepublic of Ireland
4%
2%
10%
83%
48
flagFrance
2%
6%
6%
83%
43
flagthe United States
1%
3%
8%
81%
836
flagCanada
3%
1%
11%
81%
54
flagPakistan
0%
5%
5%
78%
19
flagUkraine
4%
4%
0%
76%
21
flagIndia
2%
3%
12%
74%
206
flagRussia
3%
3%
6%
72%
29
flagthe Netherlands
4%
6%
14%
70%
47
flagthe Philippines
0%
0%
10%
65%
20

Gender

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

Details

Author: Steve Lamberty
tools
Should this question be improved? Improve it.
Globalquiz questions are translated by users for other users. Translate this question.