The standard error of measurement (SEM) is directly related to the reliability of a test. It provides an estimate of the amount of error inherent in an observed test score due to the imperfect reliability of the test. “Calculation of SEM is an important part of evaluating test reliability, as it reflects the consistency and precision of scores.”
[Reference: Helwig, A. A. (2020). CPCE Study Guide and Review; Cohen, R. J., & Swerdlik, M. E. (2018). Psychological Testing and Assessment., ]
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