The psychologists and therapists at Horizon provide counseling and therapy services to children, adolescents and adults, as well as psychological testing services for the evaluation of ADHD, autism, and learning disabilities.
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Adult ADHD is one of the most underdiagnosed conditions in the United States. Research estimates that approximately 4.4% of U.S. adults meet diagnostic criteria for ADHD, yet many were never identified as children and have spent decades managing symptoms without a name for what they were experiencing. In high-achieving, fast-paced communities like Cornelius and the broader Lake Norman area — where professional demands and long commutes to Charlotte are common — the hidden weight of untreated adult ADHD can affect careers, relationships, and quality of life.
ADHD is also the most commonly diagnosed neurodevelopmental condition in childhood, affecting approximately 9.8% of U.S. children ages 3 to 17. In Iredell and Mecklenburg counties — which together serve the Lake Norman corridor — growing school populations and rising caseloads mean that many children with ADHD wait longer than they should for evaluation and support. At Horizon Psychological Services, our ADHD assessment process is comprehensive and clinically rigorous for both adults and children.
Because many of the symptoms of ADHD are often seen in other disorders, such as depression, anxiety, memory, and learning disorders, it is important to have a thorough psychological evaluation to determine what psychological processes are underlying the symptoms that are being observed. Some care providers will diagnose using rating scales alone – however, rating scales indicate only that an individual is displaying symptoms that are seen in people who have ADHD, and they should not be used by themselves to definitively diagnose. Formal psychological evaluation can be used to make a more definitive diagnosis, as well as make appropriate treatment recommendations.
At Horizon Psychological Services, the ADHD assessment process is informed by the latest guidelines and recommendations from top researchers in the area of ADHD. All clients who are being evaluated for ADHD can expect to have a thorough clinical interview prior to scheduling testing in order to determine whether further testing is appropriate. For most clients, testing will involve the administration of a Wechsler intelligence test; objective measures of executive functioning; general behavior and more specific ADHD-symptom scales (with information gathered from collateral sources as well, such as family members and, in the case of children, the school); and several measures of mood and personality. Using the information gathered from these sources, a formal report is written and a determination is made as to the most appropriate diagnosis and treatment recommendations.
Following the initial interview, during which the clinical history is taken and a determination is made to go forward with the testing process, an appointment for testing is usually set for 1-2 weeks later; this allows Horizon Psychological Services staff time to get authorization for testing, if required by your insurance company, and allows you, the client, time to have family and school personnel (if applicable) to complete behavior rating scales. The actual face-to-face testing session ranges from 2 to 3 hours in length. Clients can expect to be called about setting up a face-to-face feedback session and receive a copy of the evaluation report approximately 2 to 3 weeks after all testing is completed and rating scales are received back.
Adult ADHD is one of the most underdiagnosed conditions in the United States. Research estimates that approximately 4.4% of U.S. adults meet diagnostic criteria for ADHD, yet many were never identified as children and have spent decades managing symptoms without a name for what they were experiencing. In high-achieving, fast-paced communities like Cornelius and the broader Lake Norman area — where professional demands and long commutes to Charlotte are common — the hidden weight of untreated adult ADHD can affect careers, relationships, and quality of life.
ADHD is also the most commonly diagnosed neurodevelopmental condition in childhood, affecting approximately 9.8% of U.S. children ages 3 to 17. In Iredell and Mecklenburg counties — which together serve the Lake Norman corridor — growing school populations and rising caseloads mean that many children with ADHD wait longer than they should for evaluation and support. At Horizon Psychological Services, our ADHD assessment process is comprehensive and clinically rigorous for both adults and children.
Our Cornelius practice serves adults and families across the Lake Norman region, including those who have suspected ADHD for years and those recently prompted to seek answers. Following your assessment, we provide a detailed written report and a feedback session that translates clinical findings into practical guidance — including specific accommodations, instructional strategies, and referrals when additional support is warranted. You will understand what the results mean and what options are available going forward.
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