Attention Deficit Disorder with/without Hyperactivity (ADD/ADHD) is present at adulthood with a prevalence estimated around 4% in the general population regardless of culture and language. The Adult ADD Self-Report Scale v1.1 (ASRS v1.1) is a self-reported questionnaire devised to facilitate the screening of ADHD in primary care settings. It is part of the World Health Organization Composite International Diagnostic Interview (WHO-CIDI). The 18 items are written to reflect the DSM-IV diagnostic criteria for ADHD and are rated from 0 (“Never”) to 4 (“Always”). Following WHO's guidelines the ASRS was translated into French and back-translated into English. 350 subjects filled out the ASRS (students in Paris and parents of a child diagnosed with ADD/ADHD in Nice). Its psychometric properties are presented. The ASRS v1.1 can be found online at http://www.hcp.med.harvard.edu/ncs/asrs.php.