Clinicians must often rely on self-report data to make a diagnosis of attention-deficit/hyperactivity disorder (ADHD) in adults. Unfortunately, self-report data are subject to intentional distortion. This becomes a concern when assessing for the disorder in the college population due to perceptions that there are benefits to having a documented diagnosis, such as academic accommodations and prescriptions for medications. In the present study, college students without a history of ADHD diagnosis were significantly more likely than chance to be successful at faking the symptoms of ADHD on two rating scales. Specifically, 77% to 93% were successful at faking the appropriate number and pattern of ADHD symptoms after reading and studying ADHD diagnostic criteria for five minutes. Neither scale was more successful than the other at preventing false positives. Findings are compared to other research and implications for practice are discussed. (Contains 2 tables.)