Sleep Disorders, Chronotype, and Functional Impairment in the Restrictive ADHD Phenotype

Inclusion Criteria: * Age between 7 and 12 years * Willingness to participate in the study with provided consent * Diagnosis of ADHD according to the Schedule for Affective Disorders and Schizophrenia for School-Age Children - Present and Lifetime Version - Turkish adaptation (K-SADS); no comorbid psychiatric diagnosis (except Oppositional Defiant Disorder) * Presence of 6 or more inattention symptoms accompanied by 5 or fewer hyperactivity/impulsivity symptoms on the Disruptive Behavior Disorders Rating Scale based on Diagnostic and Statistical Manual of Mental Disorders-IV * No psychotropic medication use in the past 3 months Exclusion Criteria: * Families who do not consent to participate in the study * Children and adolescents with chronic medical conditions and/or currently taking any medications * Children and adolescents with intellectual disability (mental retardation) * Children and adolescents with comorbid psychiatric diagnoses * Presence of a neurological disorder * History of head trauma