
Membership is open to those who meet the following criteria:
Developmental psychologists from the following countries are eligible for reduced fees
| Afghanistan | Gabon | Niger |
| Albania | Gambia | Nigeria |
| Algeria | Georgia | Pakistan |
| Angola | Ghana | Palau |
| Armenia | Grenada | Lebanon |
| Azerbaijan | Guatemala | Paraguay |
| Bangladesh | Guinea-Bissau | Peru |
| Belarus | Guyana | Philippines |
| Belize | Haïti | Poland |
| Benin | Honduras | Rumania |
| Bhutan | Hungary | Russia |
| Bolivia | India | Rwanda |
| Bosnia and Herzegovina | Indonesia | Samoa |
| Botswana | Iran | Senegal |
| Brazil | Iraq | Sierra Leone |
| Bulgaria | Jamaica | Slovak Republic |
| Burkina Faso | Jordan | Solomon Islands |
| Burundi | Kazakhstan | Somalia |
| Cambodia | Kenya | South Africa |
| Cameroon | Kiribati | Sri Lanka |
| Cape Verde | Kyrgyz Republic | St Lucia |
| Central African Republic | Lao | St Vincent |
| Chad | Lesotho | Sudan |
| Chile | Liberia | Suriname |
| China | Lithuania | Swaziland |
| Colombia | Macedonia | Syria |
| Comoros | Madagascar | Tajikistan |
| Congo | Malawi | Tanzania |
| Costa Rica | Malaysia | Thailand |
| Côte d'Ivoire | Maldives | Togo |
| Croatia | Mali | Tonga |
| Cuba | Marshall Islands | Trinidad and Tobago |
| Czech Republic | Mauritania | Tunisia |
| Djibouti | Mauritius | Turkey |
| Dominica | Mexico | Turkmenistan |
| Dominican Republic | Micronesia | Uganda |
| Ecuador | Moldova | Ukraine |
| Egypt | Mongolia | Uzbekistan |
| El Salvador | Morocco | Vanuatu |
| Equatorial Guinea | Mozambique | Venezuela |
| Eritrea | Myanmar | Vietnam |
| Estonia | Namibia | Yemen |
| Ethiopia | Nepal | Zambia |
| Fiji | Nicaragua | Zimbabwe |