Which criteria must the symptoms of hyperactivity, inattention, and impulsivity meet to confirm the diagnosis of attention-deficit/hyperactivity disorder (ADHD)?

Choice A rationale Although diagnostic tools (like rating scales or questionnaires) are often used to gather information from parents and teachers, the diagnosis of ADHD is fundamentally a clinical diagnosis. It is based on a structured clinical interview and the persistence and pervasiveness of symptoms, not merely confirmation by a specific psychological or diagnostic test. Choice B rationale While ADHD symptoms can indeed be exacerbated by severe stress, the diagnostic criteria from the DSM-5 (Diagnostic and Statistical Manual of Mental Disorders, 5th Edition) mandate that the symptoms must be present for at least 6 months and be inconsistent with the developmental level. They must be present before age 12 and cause clinically significant impairment in functioning, not just worsen under stress. Choice C rationale The DSM-5 criteria for ADHD require that the symptoms of inattention, hyperactivity, and impulsivity must be present in two or more settings (e.g., home, school, work, or with friends/relatives). This cross-situational requirement is crucial because it helps to rule out a disorder whose symptoms are simply a reaction to a specific situational stressor or environmental trigger. Choice D rationale While clinical observations are a part of the diagnostic process, the diagnosis relies significantly on historical data and reports from parents, teachers, and the individual, using established criteria. Requiring symptoms to be confirmed only by supervised clinical observations would be impractical and insufficient, as symptoms may fluctuate and may not be consistently present during a brief observation.