Why Cogtest?

Cogtest’s advantages over other computerized batteries and “paper-and-pencil” tests:

Current cognitive assessment tools have a number of shortcomings. Many are insensitive to the degree of clinical severity of the illness. Only with the Cogtest Dynamic Titration strategy is it possible to use the same test in patients with a mild to severe disease. Dynamic Titration Strategies mean tests automatically adjust difficulty level, branch to relevant items, and avoid unnecessary items that are either too easy or too difficult. Thus, the total testing time needed for the valid assessment of each function is minimized.

In addition, Screening Pre-tests will terminate testing rationally in cases where results might be invalid. This reduces the cost of subjects who might otherwise be maintained in a trial, undergoing costly procedures without yielding useful data.

The benefits of computerized testing over the option of “paper-and-pencil” are many: Older tests are cumbersome, require antiquated paperwork and equipment and often fail to tap functions defined by recent research. Indeed, many of these widely used paper and pencil tests were developed in the 1940’s and remain unchanged!

Examiner training is thus time-consuming and expensive, with an inevitably high rater turnover. The consequences are poor reliability and reduced stability of data due to examiner errors and drift. With a fully computerized system, instructions, collection of subjects’ responses and scoring are all completely automated, and there is little opportunity for examiner error.

The audit trail for paper and pencil testing often lack sufficient detail for objective quality monitoring, with data recorded on CRFs open to tampering. In contrast, Cogtest’s computer-generated data are 100% verifiable with respect to every response made by the subject, with high degrees of timing precision.

Data files obtained using the computerized tests can be verified completely. They can be unambiguously determined as identical to those represented in the central database and in the final analysis dataset that is delivered to the sponsor on completion of the study.

Cost efficiency

The total cost of computerized assessment is lower than that of a “paper-and-pencil” battery for several reasons. Indeed, these affect the overall cost of the trial, not just the cognitive assessment component.

Staff training requirements are higher for paper-and-pencil measures than for computerized assessment. Our tests can be administered by staff not trained in psychological assessment, and salaries are typically 25% to 40% higher for staff who have qualifications to serve as psychometricians using paper-and-pencil tests.

Data loss of 10% is anticipated in paper-and-pencil testing due to examiner errors in administration, recording of response, and/or scoring. In this situation, the sponsor needs to recruit 10% more participants than necessary to complete the analysis sample. The CRA/CRO costs for monitoring are higher because of this.