Abstract

Background: In Chile, it is estimated that the prevalence of Attention-Deficit/Hyperactivity Disorder (ADHD) is at 10%. Faced with this reality, public policies promote the timely detection of this condition; however, this situation generates over and underdiagnosis problems attributable to the lack of updated scales. Objective: The purpose of this study was to assess the psychometric properties of the Conners-3 Rating Scale in its self-report short form in Chilean children and adolescents. Method: The Conners-3 Self-report Scale and a convergent validity measure (BRIEF-2) were applied to a non-probability sample (n = 265) of elementary and high school students (8 to 18 years old). A confirmatory factor analysis (CFA) was carried out, in addition to an internal consistency analysis and an item-total and inter-scale correlation analysis. Results: All the items presented an acceptable item-scale correlation. The five-factor internal structure of the CFA coincides with the original. Scales also presented an acceptable internal consistency and evidence of convergent validity. Conclusions: The Conners-3 Self-report Scale presents acceptable psychometric properties for use in the detection phase of ADHD; furthermore, its use is suggested as part of a comprehensive assessment that incorporates other assessment methods. © 2024 Terapia psicologica.