In a previous study that assessed the performance of children attending public and private day care centers, all with level B of socioeconomic status and aged 0 to 3 years, children attending public day care centers showed cognitive and fine motor performance lower than those in private day care centers. These results was attributed to possible structural and pedagogical differences between the types of day care centers, as the children showed no changes in organic systems and were of the same socioeconomic level. This study, however, did not evaluate the quality of the day care environment.27