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%
23
flagUnknown
1%
2%
4%
91%
1074
flagNorway
0%
0%
5%
91%
35
flagSpain
0%
4%
4%
91%
23
flagDenmark
0%
8%
0%
91%
23
flagGermany
0%
0%
8%
90%
198
flagPoland
1%
2%
7%
86%
16642
flagAustralia
2%
2%
9%
86%
44
flagSweden
0%
0%
13%
86%
23
flagthe United Kingdom
1%
1%
7%
85%
432
flagCanada
3%
1%
10%
82%
58
flagFrance
2%
6%
6%
82%
45
flagItaly
0%
3%
14%
82%
28
flagthe United States
1%
3%
8%
81%
866
flagRepublic of Ireland
5%
1%
11%
80%
51
flagIndia
2%
3%
11%
75%
221
flagRussia
4%
4%
6%
75%
48
flagUkraine
7%
7%
2%
74%
39
flagthe Netherlands
4%
4%
14%
70%
61
flagthe Philippines
0%
4%
8%
56%
23

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.