Welcome to our new regular column, featuring a collection of abstracts that highlight some of the new research in the field of attention deficit hyperactivity disorder (ADHD). Research into this field is diverse and rapidly expanding, and we will endeavour to give you a sample of new findings and trends. We have collated the abstracts from a number of peer-reviewed journals. Contact details and/or links to the full articles are provided, although you may need subscription access to view them. In this issue we highlight the complexities of co-morbidity, with Faraone examining a possible genetic continuum between ADHD, bipolar disorder and schizophrenia. We also look at the use of electroencephalography (EEG) feedback to augment and improve medication for ADHD. Our final two abstracts look at topical areas for discussion: the debate over whether video games lead to violent behaviour, and the potential comorbid effects of cannabis use and ADHD.