"Balancing Act: How College Students Manage Technology While in the Library during Crunch Time," Alison J. Head and Michael B. Eisenberg, Project Information Literacy Research Report, University of Washington's Information School, October 12, 2011
http://projectinfolit.org/pdfs/PIL_Fall2011_TechStudy_FullReport1.1.pdf
(Study included both 2 and 4 year college students)