Clarifying Internally-Directed Cognition: A Commentary on the Attention to Thoughts Model

David R. Vago , Norman Farb , and R. Nathan Spreng Department of Psychology, Vanderbilt University, Nashville, Tennessee; Contemplative Sciences Center, University of Virginia, Charlottesville, Virginia; Department of Psychology, University of Toronto Mississauga, Mississauga, Canada; Laboratory of Brain and Cognition, Montreal Neurological Institute, Department of Neurology and Neurosurgery, Faculty of Medicine, McGill University, Montreal, Canada; Departments of Psychiatry and Psychology, McGill University, Montreal, Canada; Douglas Mental Health University Institute, Verdun, Canada; McConnell Brain Imaging Centre, Montreal Neurological Institute, McGill University, Montreal, Canada