Judith T. Fullerton, PhD, CNM, is Associate Professor of Clinical Family Medicine in the Department of Community and Family Medicine, University of California, San Diego, School of Medicine, and Assistant Dean, University of California, San Francisco, School of Nursing. She received her nurse-midwifery education from Columbia University and her doctorate in health education from Temple. She currently directs a program of family nurse-practice and nurse-midwifery studies and serves as chair of the research committee for the ACNM Certification Council.
EVALUATION OF RESEARCH STUDIES
Part IV: Validity and Reliability—Concepts and Application
Article first published online: 6 JAN 2011
1993 American College of Nurse Midwives
Journal of Nurse-Midwifery
Volume 38, Issue 2, pages 121–125, March-April 1993
How to Cite
Fullerton, J. T. (1993), EVALUATION OF RESEARCH STUDIES. Journal of Nurse-Midwifery, 38: 121–125. doi: 10.1016/0091-2182(93)90146-8
- Issue published online: 6 JAN 2011
- Article first published online: 6 JAN 2011
The concepts of validity and reliability are defined within the context of applied clinical research. Validity concerns what an instrument measures and how well it does so. Reliability concerns the faith that one can have in the data obtained from use of an instrument, that is, the degree to which any measuring tool controls for random error. The researcher selects a measure that demonstrates content, criterion, or construct validity, according to the intended use of the measurement tool. Similarly, the researcher selects a measure that demonstrates a degree of reliability that is needed for its application. It is possible to have reliability without validity, but it is logically impossible to demonstrate that an unreliable test is valid.