Sensory modulation issues especially can mimic ADHD. I found a table somewhere online that compared bored gifted with sensory and ADHD symptoms. There is quite a large overlap.
As far as I'm aware there has to be a high level of a wide range of symptoms in more than 1 environment before they can diagnose ADHD.
But if the ONLY issue is "easily distracted" then I would approach a sensory integration trained OT first and have them do the SIPD tests to check for sensory issues before testing for ADHD as sensory issues may give a false positive for ADHD if the person testing isn't familiar enough with SI.
