The purpose of this work is to determine publishing behaviors of academic scientists who signed the PLoS (Public Library of Science) "Open Letter to Scientific Publishers". From the original 3,741 signers in the United States on the PLoS list, a random stratified sample of both medical and biological academic scientists who are either Assistant, Associate or Full professors was selected. After selecting the sample, names were entered into Google and Google Scholar to compile full lists of authors' publications, mainly by collecting publication lists provided on curriculum vitae. Following the collection of publication lists, journal names were resolved and coded as open access or non-open access by using Sherpa RoMEO and DOAJ (Directory of Open Access Journals). Publication behaviors were tracked from 2001--2007 in order to discover any trends. Results show that trends were similar for both medical and biological disciplines, and overall, professors adhered to the "Open Letter" pledge
