Abstract
The Child Behavior Checklist/1.5-5 and the Caregiver /Teacher Report Form are one of the most widely internationally recognized instruments to evaluate desadaptative behaviors which may affect the current and future development of preschool children. The psychometric behavior of both instruments was evaluated in a socioeconomically diverse sample of 550 Chilean preschool children. In general, it was observed an analog behavior of both compared to the one obtained with studies in other societies. The confirmatory factor analysis showed a suitable adjustment of the original bifactor model. However, in the CBCL, the scores obtained are higher than in most of the countries and, comparatively, in both instruments, a greater effect of gender was observed. The findings obtained are analyzed and, normative and conceptual suggestions are given for the use of both instruments in preschool children in our country.