Conducts research and education into the area of intellectual disability/mental retardation. (Dunedin, New Zealand)

Promotes understanding of neurological and behavioral development, with special emphasis on mental retardation and other developmental disabilities. (Waltham, Massachusetts)

An international and interdisciplinary scientific organization to promote worldwide research and exchange of information on intellectual, learning and related developmental disabilities (mental retardation)

Provides details of research, student training, publications, and clinical services for children and adults. University of Alberta, Canada.

Coordinates and conducts research related to human development, mental retardation, and developmental disabilities. Links for researchers and families about early child development, neurobiology research and developmental disabilities. (University of Alabama at Birmingham, Alabama)

Mental Retardation Research Center focuses on molecular and genetic sciences. (University of Wisconsin at Madison)