<i>We have demonstrated in a previous study that a high degree of worry in patients with generalized anxiety disorder (GAD) correlates positively with intelligence and that a low degree of worry in healthy subjects correlates positively with intelligence.</i><p>Much simpler alternate hypothesis: Generalized Anxiety Disorder is more accurately diagnosed in intelligent people.<p>(As for the study, the small sample size etc makes it an object lesson into how to create a study that won&#x27;t replicate.  Why is this on HN?)