![]() ![]() When reading studies, you must assess the reliability and validity of the instruments to determine the soundness of these selections in relation to the concepts (concepts are often called constructs in instrument development studies) or variables under study. Nurse investigators use instruments that have been developed by researchers in nursing and other disciplines. The growing importance of measurement issues, instrument development, and related issues (e.g., reliability and validity) is evident in the Journal of Nursing Measurement and other nursing research journals. Researchers often face the challenge of developing new instruments and, as part of that process, establishing the reliability and validity of those instruments. ![]() From either perspective, the instruments that are used in a study must be evaluated. Issues of reliability and validity are of central concern to researchers, as well as to an appraiser of research. Unless measurement instruments validly (accurately) and reliably (consistently) reflect the concepts of the theory being tested, conclusions drawn from a study will be invalid or biased and will not advance the development of evidence-based practice. Measurement of nursing phenomena is a major concern of nursing researchers. ![]() Go to Evolve at /LoBiondo/ for review questions, critiquing exercises, and additional research articles for practice in reviewing and critiquing. Contrasted-groups (known-groups) approach
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