Introduction

: The aim of the study is to demonstrate the need to apply an assessment methodology in At tention Deficit Hyperactivity Disorder (ADHD) due to the lack of agreement between parents and teachers on the criteria of the Diagnostic and Statistical Manual of Mental Disorders, fifth edition (DSM-5).

Methods

: This is a retrospective descriptive study of three years and ten months. The sample was drawn from 640 subjects assessed and diagnosed with ADHD, aged between 8 and 16 years, and with a Total Intellectual Quotient (TQ) between 80 and 120. Subjects underwent a neuropsychological assessment. Certain scales of the questionnaires: Child and Adolescent Assessment Sys tem (SENA) and Behavioural Assessment of Executive Function-2 (BRIEF-2), both completed by parents, and the DSM-5 criteria answered by parents and teachers were taken into account.

Results

: As a result, a low concordance was observed between the observations obtained from the DSM-5 between parents and teachers.