Objective: To examine the ability of the flicker task to demonstrate greater utility in discriminating performance in young adults with and without ADHD compared to the Conners' CPT (CCPT). Method: Flicker task and CCPT performance were compared between an ADHD (n = 28) and control (n = 30) group of college students. Results: This study replicated previous flicker task findings, providing support for using the flicker task to demonstrate the robust nature of change blindness. However, the flicker task did not demonstrate better discriminative utility than the CCPT. Task-dependent measures correlated with ADHD rating scale indices of inattention and hyperactivity/impulsivity, indicating that CPTs lack symptom domain specificity. Conclusion: Results support the growing evidence that CPTs currently provide only modest utility for discriminating performance in adults with and without ADHD. Recommendations are provided regarding the future study of CPTs as a valid measure of ADHD performance and the potential utility of the flicker task. (Contains 2 figures and 4 tables.)