Cross-validation of Clinical Assessment of Attention Deficit-Adult Symptom Validity Scales in Adults with ADHD

This study validates three symptom validity scales (Negative Impression, Infrequency, Positive Impression) from the Clinical Assessment of Attention Deficit-Adult questionnaire in 543 adults undergoing ADHD evaluation. The Negative Impression scale showed the best performance for detecting overreported symptoms, though all scales had limited ability to discriminate invalid neurocognitive performance.