In a multicultural study involving three ethnic groups, an attempt was made to evaluate features of an infant's developmental niche in the context of immigration. Four dimensions are reported: (1) parental beliefs about child development; (2) aspects of the baby's physical and social environment, including number of caretakers, crowding of the dwelling, sleeping arrangement, visits outside the home, available toys, etc.; (3) maternal perception of the infant temperament; and (4) assessment of the infant's development. A total of 22 Haitian, 21 Quebeckers, and 20 Vietnamese 9-month-old first-born babies and their mothers participated in the study and were visited twice at their homes by a research assistant belonging to their cultural group. Results indicated several significant differences between groups in parental beliefs, in the way the mothers structure the environment and in their perception of infant temperament. Several similarities were found between the Vietnamese and the Haitians, suggesting that at least during the infancy period child care practices and parental beliefs are related more to the economic level of society than the cultural level. Consonance among the different components of the developmental context and their respective relation to some ecological aspects of the immigrant group are discussed. (Author/RH)