Many psychiatric disorders are characterized by dysregulation of perception and attention, for instance when patients with Obsessive-Compulsive or Anxiety disorders are exposed to potentially threatening situations. In collaboration with the lab of Dr. Carol Mathews, we examine how novel measures of activity and competition in visual cortex obtained with electroencephalography (EEG) can be used to predict symptoms of Obsessive-Compulsive and Anxiety disorders. Devloping and testing reliable and valid quantitative indices of perception and attention that vary systematically with self-reported symptoms is a necessary step towards objective assessment of the brain circuits underlying emotional dysfunction in these disorders. Ultimately, such markers can be used to inform evidence-based intervention and personlaized treatment efforts.