The Journal of Mental Health Research in Intellectual Disabilities, the official research journal of NADD, is an international, peer-reviewed interdisciplinary journal with the purpose of reporting original scientific and scholarly contributions to advance knowledge about mental health issues among persons with intellectual and developmental disabilities. The journal addresses issues related to the full range of mental health concerns including neuro-developmental disorders /autism spectrum disorders, severe behavior problems, criminality, substance abuse, and genetic phenotypes across the life span. The journal seeks to publish empirically-based research such as epidemiological or observational studies, studies of prognosis and diagnosis, related to the development and/or prevention of mental health problems in persons with intellectual disabilities; development of screening and diagnostic instruments; clinical trials of psychosocial and pharmacological interventions including health economic evaluations, systematic reviews and meta-analyses, qualitative studies. The journal welcomes editorials, short reports and correspondence. Newly published books are accepted for review.Peer Review Policy: All research articles in this journal have undergone rigorous peer review, based on initial editor screening and anonymous refereeing by at least two anonymous referees.