The Test of Variables of Attention (T.O.V.A.) is a computerized task that measures sustained attention and impulse control over time. It is a well-studied and FDA approved attention measure that has shown high accuracy in distinguishing individuals with and without ADHD, and it provides objective, standardized data that is less influenced by language, education, or observer bias.

T.O.V.A. is always used as part of a comprehensive assessment-its results are combined with interviews, history, and rating scales and are not used as a stand-alone diagnostic test. It also helps guide treatment decisions over time by tracking response to medications or behavioral strategies, detecting subtle changes, and highlighting specific attention strengths and weaknesses.