This project supports an age-six assessment of 669 children and their families who were enrolled in a randomized trail that compared prenatal and infancy home visiting by nurses versus paraprofessionals. Both groups of visitors in each study employed essentially the same program model. The program model has proven to be effective using nurses when focused on European-American and African Americans in earlier trails conducted over the past 20 years. Paraprofessional visitors in the current trail share many of the social characteristics of the families they visited. The current study also allows us to examine the extent to which these different visitor types produce effects with Mexican Americans that are similar to those achieved with European-Americans and African Americans in previous trails of this program using nurse home visitors. The sample is composed of low-income women who had no previous live births and who were substantially ethnic minorities (46 percent Mexican American, 16 percent African American, and 3 percent Native American/Asian), unmarried (87 percent), and less than 19 years of age (58 percent) at the time of registration during pregnancy.