Gifted Support Services

ADHD & Executive Functioning Evaluation

Dr. Bradley Siu
Clinical Psychologist

Dr. Siu is a senior supervising psychologist with decades of experience as a Neurodivergent Assessment Specialist. He has supported over 1500 clients in ADHD testing over the past two decades.

ADHD & Executive Functioning Assessment

At Gifted Support Services, Dr. Siu provides practical, sensible, and timely ADHD evaluations. Unlike broad neuropsychological or educational assessment batteries, which may be time and cost-prohibitive, Dr. Siu uses specific neuropsychological instruments designed to measure underlying domains associated with the condition, such as memory, attention, language, inhibition, and executive function.


Attention Deficit Hyperactivity Disorder is a neurodevelopmental disorder that results from complex factors related to genetics, environment, and development that affect the structure and function of brain regions and networks. Often considered a disorder of executive functioning, individuals may have challenges with planning, inhibition, organization, distractibility, forgetfulness, or with the self-management of behaviors and actions.


Please be reassured that this is a collaborative process, and Dr. Siu carefully considers the many factors that can impact attentional functioning. With an unbiased interactive approach, he combines data, context, current functioning, and developmental history that may lead to improved overall performance, psychological well-being, and interpersonal relationships.

Please reach out to ask questions or schedule. Scheduling is easy and can be done online.