Two of the most commonly used scales in diagnosing attention-deficit/hyperactivity disorder (ADHD) are moderately sensitive and specific, but one may have the edge over the other, a new meta-analysis shows. In comparing diagnostic performance of ADHD scales, investigators, led by Ling-Yin Chang, PhD, Taipei Medical University, in Taiwan, found that the Child Behavior Checklist–Attention Problem (CBCL-AP) scale, the Conners Rating Scale–Revised (CRS-R), and the Conners Abbreviated Symptom Questionnaire (ASQ) came out on top, but they write that the ASQ "may be the most effective diagnostic tool in assessing ADHD because of its brevity and high diagnostic accuracy."