Unproctored Internet Test Verification: Using Adaptive Confirmation Testing

Unproctored Internet testing (UIT) is commonly used in employment test administration. When the test is high stakes, the International Guidelines on Computer-Based and Internet-Delivered Testing recommend to follow up the results with a confirmation test in a controlled setting. This article pro-poses and compares two methods for detecting whether a test taker’s original UIT responses are consistent with the responses from a follow-up confirmation test. The first method is a fixed length adaptive confirmation test using the likelihood ratio (LR) test to evaluate cheating and the second method is a variable length adaptive confirmation test using an extension of the stochastic curtailed truncated sequential probability ratio test (SCTSPRT) to evaluate cheating. Simulation studies indi-cated that the adaptive confirmation test using the SCTSPRT was almost four times shorter while maintaining the same detection power. The study also demonstrated that cheating can have a detri-mental effect on the validity of a selection procedure and illustrated that the use of a confirmation test can remedy the negative effect of cheating on validity