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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%

6%

6%

86%

44

Greece

0%

0%

6%

86%

30

Poland

1%

3%

7%

85%

19851

Germany

2%

3%

6%

85%

438

Australia

3%

2%

8%

85%

81

Republic of Ireland

7%

0%

7%

85%

27

Singapore

0%

0%

12%

83%

31

the United States

2%

4%

9%

79%

923

the United Kingdom

1%

2%

10%

79%

286

Canada

4%

4%

5%

79%

74

Austria

3%

7%

7%

78%

79

Kazakhstan

3%

5%

5%

75%

54

Malaysia

0%

13%

9%

72%

22

Ukraine

3%

5%

12%

71%

315

Belarus

7%

10%

4%

68%

67

the Philippines

5%

5%

2%

67%

40

India

5%

7%

14%

66%

354

Russia

4%

5%

12%

64%

346

the Netherlands

6%

3%

18%

62%

32

the United Arab Emirates

0%

3%

18%

55%

27

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