Task engagement, cerebral blood flow velocity, and diagnostic monitoring for sustained attention
Journal of Experimental Psychology Applied (2010) - Comment
pubmed: 20565203  doi: 10.1037/a0019572  issn: 1939-2192  issn: 1076-898x 

Gerald Matthews, Joel S. Warm, Lauren E. Reinerman-Jones, Lisa K. Langheim, David A. Washburn, Lloyd Tripp