Consistency of sustained attention across modalities: comparing visual and auditory versions of the SART
Canadian Journal of Experimental Psychology/Revue canadienne de psychologie expérimentale (2012) - Comment
pubmed: 21910522  doi: 10.1037/a0025111  issn: 1878-7290  issn: 1196-1961 

Paul Seli, James Allan Cheyne, Kevin R. Barton, Daniel Smilek