Which one of the following statements regarding test reliability is TRUE?
A) Researchers must choose one method of estimating the reliability/precision of test scores.
B) Researchers can identify the causes of random error.
C) No measurement instrument is perfectly reliable or consistent.
D) A measurement instrument should be perfectly reliable or consistent.

Question

Quizplus · Accepted Answer

No measurement instrument is perfectly reliable or consistent. Reliability is the degree to which a measurement instrument gives consistent results over time or across different raters. However, there will always be some degree of error or inconsistency, known as random error, that cannot be completely eliminated. It is important for researchers to estimate and report the reliability of their measures to determine the extent to which their results can be trusted. There are various methods for estimating reliability, and researchers should choose the most appropriate method given the nature of their instrument and design.

Which One of the Following Statements Regarding Test Reliability Is