Which type of reliability assesses consistency of the same observer across time?

Which type of reliability assesses consistency of the same observer across time?

• A. Inter-observer reliability
• B. Intra-observer reliability
• C. Test-retest reliability
• D. Construct validity

Answer: (B)

The main idea here is whether one person can judge or rate the same thing consistently over different occasions. That is intra-observer reliability. It focuses on the stability of that single observer’s measurements from one time to another, guarding against drift due to fatigue, memory, or subjective bias. Inter-observer reliability would be about consistency between different observers, not the same person over time. Test-retest reliability deals with the stability of a measurement across time, but it often concerns the instrument or the trait being measured, not specifically the consistency of one observer’s judgments. Construct validity is about whether the measurement truly reflects the concept it’s meant to measure, not about consistency over time.

The main idea here is whether one person can judge or rate the same thing consistently over different occasions. That is intra-observer reliability. It focuses on the stability of that single observer’s measurements from one time to another, guarding against drift due to fatigue, memory, or subjective bias.

Inter-observer reliability would be about consistency between different observers, not the same person over time. Test-retest reliability deals with the stability of a measurement across time, but it often concerns the instrument or the trait being measured, not specifically the consistency of one observer’s judgments. Construct validity is about whether the measurement truly reflects the concept it’s meant to measure, not about consistency over time.