Psychological Assessment (Feb 25, 2019). DOI:10.1037/pas0000706 The current project outlines the development of the Attention-Deficit/Hyperactivity Disorder (ADHD) Symptom Infrequency Scale (ASIS), a stand-alone measure designed to identify individuals feigning or exaggerating symptoms to receive a diagnosis of ADHD.. To read the full article, log in using your NHS OpenAthens details.