CBT Through Internet and Smartphones for Adults With ADHD - a Randomized Controlled Trial

The purpose of this study is to further evaluate the treatment for adults with ADHD used in our previous study (clinicaltrials.gov ID NCT01659164). It will now be converted to therapist supported, internet-delivered cognitive behavioral therapy (iCBT) with an additional smartphone application and evaluated through a randomized controlled trial during 12 weeks. The patients will be randomized to one of three conditions * an active treatment group where the intervention is based on cognitive - and dialectical behavioral therapy (CBT and DBT) and the mobile app. * an active ICBT-treatment based on psychoeducation, a CBT stress-reduction program and Applied Relaxation, and * treatment as usual (TAU) / waiting list. The main objective of the study is to evaluate if both of the treatment conditions will show better outcomes than TAU regarding decreased ADHD symptoms and increased functioning and life quality. Another objective is to evaluate if the group receiving the active iCBT treatment (based on CBT and DBT) will show better outcomes in comparison to the control group regarding ADHD symptoms, overall functioning and life quality.