Adopted from information on the UCSF Family Health Outcomes Project web site
Adopted from Chapter 3, Conducting research literature reviews: from the Internet to paper, by Arlene Fink; Sage, 2010.
Reliable data collection: relatively free from "measurement error."
» Is the survey written at a reading level too high for the people completing it?
» If I measure something today, then measure it again tomorrow using the same scale, will it vary? Why?
Validity refers to how well a measure assesses what it claims to measure
» If the survey is supposed to measure "quality of life," how is that concept defined? Is it measurable?
Extensive discussions of reliability and validity are available in several texts, such as Textbook in Psychiatric Epidemiology (3rd Ed.; M. Tsuang et al. Wiley. 2011; See chapters 5 and 7).