Since one particularly low score seemed to be driving the effect, we ran this comparison again without this participant, and IFG-IFG AD was still significantly lower in ADHD (n = 31, mean = 1.25 × 10−3 s/mm2, sd = 2.90 × 10−5; p =.007). The gene discussed is IFNG; the disease is attention deficit-hyperactivity disorder.