A self-guided Internet-delivered intervention for adults with ADHD: a protocol for a randomized controlled trial

•The availability of evidence-based psychological interventions for adults with ADHD is poor.•Interventions-delivered interventions may help to increase the availability of effective interventions for this group.•This paper describes a study protocol for a randomized controlled trial that examines the efficacy of MyADHD.•MyADHD was developed in cooperation with adults with an ADHD diagnosis.•The intervention is expected to improve symptoms of inattention and quality of life.