A presentation and critique of the use of multiple measures of theoretical concepts for the assessment of validity (using the multi-trait multi-method matrix) and reliability (using multiple indicators with a path analytic framework).

John L. Sullivan is Associate Professor of Media & Communication at Muhlenberg College in Allentown, PA. He earned his B.A. in German and Media Studies from Pomona College and his M.A. and Ph.D. in Communication from the Annenberg School for Communication at the University of Pennsylvania. Dr. Sullivan's research explores the links between media industries and systems of social and economic power. More specifically, he focuses on audience constructions within media organizations, the implementation of U.S. media policies, and the political economy of cultural production. Recently, Dr. Sullivan has begun a longer-term project to study the political economy of free, open source software (F/OSS) movements.