Submit
White
Purple
Pink
Yellow
Green
Red
None of these
Square
Cross
Circle
Triangle
Diamond
None of these
Female
Male
Under 18
18 - 25
26 - 49
50 - 80
Over 80
United States
China
Japan
Germany
India
Brazil
United Kingdom
Korea
France
Italy
Russia
Mexico
Canada
Spain
Indonesia
Vietnam
Turkey
Australia
Taiwan
Philippines
Afghanistan
Albania
Algeria
American Samoa
Andorra
Anguilla
Antarctica
Antigua And Barbuda
Argentina
Armenia
Aruba
Australia
Austria
Azerbaijan
Bahamas
Bahrain
Bangladesh
Barbados
Belarus
Belgium
Belize
Benin
Bermuda
Bhutan
Bolivia
Bosnia and Herzegovina
Botswana
Bouvet Island
Brazil
British Indian Ocean Territory
Brunei Darussalam
Bulgaria
Burkina Faso
Burundi
Cambodia
Cameroon
Canada
Cape Verde
Cayman Islands
Central African Republic
Chad
Chile
China
Christmas Island
Cocos (Keeling) Islands
Colombia
Comoros
Congo
Congo, the Democratic Republic of the
Cook Islands
Costa Rica
Cote d'Ivoire
Croatia
Cyprus
Czech Republic
Denmark
Djibouti
Dominica
Dominican Republic
East Timor
Ecuador
Egypt
El Salvador
England
Equatorial Guinea
Eritrea
Espana
Estonia
Ethiopia
Falkland Islands
Faroe Islands
Fiji
Finland
France
French Guiana
French Polynesia
French Southern Territories
Gabon
Gambia
Georgia
Germany
Ghana
Gibraltar
Great Britain
Greece
Greenland
Grenada
Guadeloupe
Guam
Guatemala
Guinea
Guinea-Bissau
Guyana
Haiti
Heard and McDonald Islands
Honduras
Hong Kong
Hungary
Iceland
India
Indonesia
Ireland
Israel
Italy
Jamaica
Japan
Jordan
Kazakhstan
Kenya
Kiribati
Korea, Republic of
Korea (South)
Kuwait
Kyrgyzstan
Lao People's Democratic Republic
Latvia
Lebanon
Lesotho
Liberia
Libya
Liechtenstein
Lithuania
Luxembourg
Macau
Macedonia
Madagascar
Malawi
Malaysia
Maldives
Mali
Malta
Marshall Islands
Martinique
Mauritania
Mauritius
Mayotte
Mexico
Micronesia, Federated States of
Moldova, Republic of
Monaco
Mongolia
Montserrat
Morocco
Mozambique
Myanmar
Namibia
Nauru
Nepal
Netherlands
Netherlands Antilles
New Caledonia
New Zealand
Nicaragua
Niger
Nigeria
Niue
Norfolk Island
Northern Ireland
Northern Mariana Islands
Norway
Oman
Pakistan
Palau
Panama
Papua New Guinea
Paraguay
Peru
Philippines
Pitcairn
Poland
Portugal
Puerto Rico
Qatar
Reunion
Romania
Russia
Russian Federation
Rwanda
Saint Kitts and Nevis
Saint Lucia
Saint Vincent and the Grenadines
Samoa (Independent)
San Marino
Sao Tome and Principe
Saudi Arabia
Scotland
Senegal
Serbia and Montenegro
Seychelles
Sierra Leone
Singapore
Slovakia
Slovenia
Solomon Islands
Somalia
South Africa
South Georgia and the South Sandwich Islands
South Korea
Spain
Sri Lanka
St. Helena
St. Pierre and Miquelon
Suriname
Svalbard and Jan Mayen Islands
Swaziland
Sweden
Switzerland
Taiwan
Tajikistan
Tanzania
Thailand
Togo
Tokelau
Tonga
Trinidad
Trinidad and Tobago
Tunisia
Turkey
Turkmenistan
Turks and Caicos Islands
Tuvalu
Uganda
Ukraine
United Arab Emirates
United Kingdom
United States
United States Minor Outlying Islands
Uruguay
Uzbekistan
Vanuatu
Vatican City State (Holy See)
Venezuela
Viet Nam
Virgin Islands (British)
Virgin Islands (U.S.)
Wales
Wallis and Futuna Islands
Western Sahara
Yemen
Zambia
Zimbabwe
No
Yes
My vision is normal. I don't need glasses or contacts.
I need glasses or contacts, and I wore them during the experiment.
I need glasses or contacts, but I wasn't wearing them during the experiment.
My color vision is normal.
I am red-green colorblind.
I am blue-yellow colorblind.
I have some other issue with my color vision.
5
21
74
122
I don't see a number
Stuttering
Freezing
Other issues: