testing the validity and reliability of research instruments

Using tests or instruments that are valid and reliable to measure such constructs is a crucial component of research quality. In health care and social science research, many of the variables of interest and outcomes that are important are abstract concepts known as theoretical constructs. Data that were originally gathered for a different purpose are often used to answer a research question, which can affect the applicability to the study at hand. Self-report of patients or subjects is required for many of the measurements conducted in health care, but self-reports of behavior are particularly subject to problems with social desirability biases. Several issues may affect the accuracy of data collected, such as those related to self-report and secondary data sources. The responsiveness of the measure to change is of interest in many of the applications in health care where improvement in outcomes as a result of treatment is a primary goal of research. Validity is the extent to which the interpretations of the results of a test are warranted, which depends on the particular use the test is intended to serve. Reliability estimates evaluate the stability of measures, internal consistency of measurement instruments, and interrater reliability of instrument scores. For the quantitative data, the validity and reliability of the research instrument or questionnaire had to be considered (Heale & Twycross, 2015). The process of developing and validating an instrument is in large part focused on reducing error in the measurement process. Key indicators of the quality of a measuring instrument are the reliability and validity of the measures. doi:10.1016/j.sapharm.2018.03.Issues related to the validity and reliability of measurement instruments used in research are reviewed.

The main objective of this study was to test the validity and reliability. Evaluation of methods used for estimating content validity. A reliable instrument supposes to consistently measure whatever is measured over time. Encyclopedia of Autism Spectrum Disorders. Encyclopedia of Quality of Life and Well-Being Research.

The questionnaires were distributed to more than 3000 patients across 16 PCOs in three regions of England. Encyclopedia of Quality of Life and Well-Being Research. Version 3 of the GP questionnaire, version 2 of the pharmacy questionnaire and version 1 of the walk-in centre questionnaire were subject to large-scale testing to assess reliability, validity and acceptability. Psychological Testing in the Service of Disability Determination. doi:10.1037/a0026975Ĭommittee on Psychological Testing, Including Validity Testing, for Social Security Administration Disability Determinations Board on the Health of Select Populations Institute of Medicine. Defining and distinguishing validity: Interpretations of score meaning and justifications of test use. Standards for talking and thinking about validity.

Testing the validity and reliability of research instruments