How is "reliability" defined in research instruments?

Prepare for the CITI Research Study Design Test. Utilize flashcards and multiple choice questions, with hints and explanations. Ace your exam!

Reliability in research instruments refers to the consistency of results when measurements are repeated under similar conditions. This means that if a study were to be conducted multiple times using the same measures with the same subjects (or a similar group), the results should be similar or consistent each time. High reliability indicates that the measurements are stable and dependable, which is crucial for ensuring that the findings of a study are valid and can be trusted.

Understanding reliability is essential because if a measurement instrument is not reliable, the results can fluctuate significantly, leading to questions about the credibility of the data collected. It is a foundational concept in research design, affecting the interpretations and conclusions drawn from study results. This consistency can be assessed through various methods, such as test-retest reliability or internal consistency, emphasizing the importance of reliability in evaluating the quality of research instruments.

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