Attention Deficit Disorder Evaluations

The Integrated Visual and Auditory (IVA) continuous performance test (CPT) is a screening tool used to assess attention in individuals with suspected attention difficulties such as Attention Deficit Hyperactivity Disorder (ADHD) It was designed to discriminate ADHD populations from other patient populations and normal controls. It can also be used to monitor the effectiveness of medication.

Like all CPT’s the IVA is designed to be mildly boring and demanding of sustained attention producing errors of inattention  and impulsivity.  The IVA is a computerized test which combines two types of CPT’s which assess both visual and auditory attention. By combining impulsivity and inattention in a counter-balanced design and presenting each in the auditory and visual mode, the IVA incorporates four CPT’s into one. An extensive normative database takes into account age and gender differences. Test-Retest Analysis allows for comparison between any two tests to evaluate the significance of any changes resulting from medication

In the test-retest reliability study, the IVA was found to be a significantly stable measure of performance both globally and in terms of specific scales. The sensitivity of the IVA in being able to correctly identify ADHD children who were previously diagnosed by health professionals is 92%. The Specificity (proportion of non ADHD children who received a negative finding) was 90%. The positive predictive power is 89% and the number of false negatives 7.7% (lower than most other CPT’s).

When combined with other tools to make a differential diagnosis, the IVA is an important tool in establishing a solid diagnosis of ADHD when present and differentiating factors other than ADHD that may be affecting an individual’s functioning.

Along with direct measures of attention, we use numerous objective tests completed by parents and teachers to determine a proper diagnosis, ruling out such factors as depression and anxiety that may be affecting attention. We also offer psychoeducational testing in order to rule out any learning issues that may be affecting academic performance.