Alavi, Mousa, Biros, Erik, and Cleary, Michelle (2022) A primer of inter-rater reliability in clinical measurement studies: Pros and pitfalls. Journal of Clinical Nursing, 31 (23-24). e39-e42.

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Abstract

[Extract] Quality and sound measurement are fundamental to creating professional knowledge to provide a foundation for clinical decision-making in health services. Therefore, measurement scales are commonly used in health, particularly mental health research. Although there are different types of rating scales, they are often used by a rater to make a judgement about variable/s of interest, for example participants' psychological traits such as empathy, by assigning scores to the scale designed to measure that trait (Tinsley & Weiss, 1975).

Measurement instruments are not only required to be valid and reliable but also to measure what they claim to measure in a reproducible manner. Where the validity of a measurement instrument indicates its ability to measure what it intends to, the reliability estimates show the precision of the measurement in producing similar results; both of which provide evidence about the usefulness of assessments, often in terms of scores assigned to evaluate behaviours, abilities or symptoms, relevant to psychology, education and health sciences.

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