Answered By: Meredith Semones-UCF Last Updated: Dec 12, 2014 Views: 32
Here is a definition for "cohort study" from Credo Reference, one of UCF Library's databases which you can access from Database Titles (A-Z) from Articles & Databases page
A systemised follow-up study of people for a specific period of time, or until the occurrence of a defined event such as a particular illness or death. The aim is to follow the disease course and/or the reasons for the participants’ deaths. Different cohorts may be compared and conclusions drawn about a particular disease or drug treatment. ...Black's Medical Dictionary, 42nd Edition...
and a link to validity http://medical-dictionary.thefreedictionary.com/validity
If you would like to set up a research consultation with a librarian in your discipline, here is a link to the research consultation form http://library.ucf.edu/Reference/ResearchConsultations/Default.php
UCF Ask A Librarian
See also the Research Methods & Data Sources guide.