Abstract
Prevalence studies in infant and preschool mental health have been scarce and insufficient. Considering the ample neurobiological, psychological, economical and social evidence that has demonstrated that intervening in early years may be a highly effective strategy for lowering the rates of mental health problems, is urgent to find prevalence data about early emotional and behavioral problems. To validate an instrument called Child Behavior Checklist for ages 1.5-5 (CBCL 1-5-5). The study was made through a process with expert judges, and subsequently, reliability and validation results were obtained in a sample of 418 children from Region Metropolitana. Data from a Chilean sample confirmed the bi-factorial model originally proposed by the authors who create the instrument. Internalizing dimension account for anxious-depression symptoms’, somatic complaints, and withdrawal in children, and Externalizing dimension account for atentional and behavioral problems. The CBCL 1.5-5 is a valid and reliable instrument and can be apply to Chilean reality, obtaining good signs of emotional and behavioral problems in infancy and preschool ages.This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights. Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.