Overview
Measurement reliability is a fundamental concept in statistics that ensures the consistency and dependability of measurement tools. It is crucial for researchers and practitioners to understand how reliable their measurements are, as this affects the validity of their conclusions. Different types of...
Key Terms
Example: A reliable test will yield similar scores for the same group of people over time.
Example: If students score similarly on a math test taken twice, the test has high test-retest reliability.
Example: Two teachers grading the same essay should have high inter-rater reliability if they give similar scores.
Example: A survey with multiple questions about happiness should show high internal consistency if they all relate to the same concept.
Example: A reliability coefficient of 0.85 indicates high reliability.
Example: If a scale is not calibrated, it may show incorrect weights, leading to measurement error.