Background: ADHD is related to increased mind wandering (MW). However, it is not clear whether this is restricted by the methods used to measure MW in those studies. Moreover, it is not certain whether MW is an independent characteristic of people with ADHD or only due to their poor performance level in the primary task (the task from which attention wanders). Method: Participants with ADHD were compared to two control groups: high performers and low performers in the primary task who had a similar performance level to the ADHD group. Results: The ADHD group had greater MW than the two control groups, while no difference in MW was found between the two control groups. Conclusion: Increased MW is an independent characteristic of ADHD. This was further discussed within the context of different theories regarding ADHD and MW.
Keywords: ADHD; mind wandering; sustain attention; task-related interferences.