Test of Variables of Attention - Strengths and Weaknesses

Strengths and Weaknesses

Strengths: One of the major strengths of the TOVA test is the use of a microswitch to record response time. The TOVA is unlike any other CPT's commercially available, as it is the only test which uses this tool. The microswitch can obtain very accurate response times, as the time measurement error is only ±1 ms. Other tools, such as computer keyboards/mice, can have an error rate of ±28 ms. Five out of the eight determining factors used to asses whether an individual has ADHD are time based (Response time). Therefore, any delay can severely affect the scoring, or whether the patient receives an accurate diagnosis. The TOVA can also correctly predict 87% of individuals without ADHD, 84% of non-hyperactive ADHD, and 90% of the hyperactive ADHD. These results make it one of the many effective tools which should be used when making a diagnosis. The TOVA is also relatively cheap to administer. Physicians may give to test to patients, but assistants and trained individuals can administer the test as well. This cuts the cost by making it possible to take the test without having to visit a doctor.

Weaknesses: Although the TOVA test is quite accurate, it does not provide clear enough data to make a diagnosis alone. Because of this, a battery of tools should be used before labeling a patient as ADD. Common tools used along with the TOVA include personal interviews, discussing in detail a complete family history, questionnaires, and counseling sessions. This can be viewed as a long and tedious process to complete, especially for someone with Attention Deficit Disorder.