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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).

Steve Lamberty

8

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Answers by country

Switzerland

0%

7%

4%

88%

42

Republic of Ireland

7%

0%

3%

88%

26

Poland

1%

3%

7%

85%

19749

Australia

3%

2%

8%

85%

81

Greece

0%

0%

7%

85%

27

Germany

2%

3%

6%

84%

421

Singapore

0%

0%

12%

83%

31

the United States

2%

4%

9%

79%

899

Canada

4%

4%

5%

79%

74

the United Kingdom

1%

2%

10%

78%

277

Austria

3%

7%

7%

78%

78

Kazakhstan

3%

5%

5%

75%

52

Malaysia

0%

13%

9%

72%

22

Ukraine

3%

5%

12%

71%

315

Belarus

6%

10%

4%

69%

66

the Philippines

5%

5%

2%

67%

40

India

5%

7%

14%

66%

351

Russia

4%

5%

11%

65%

334

the Netherlands

6%

3%

18%

62%

32

the United Arab Emirates

0%

3%

18%

55%

27

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