If two different observers rate the same phenomenon similarly, this demonstrates which reliability?

If two different observers rate the same phenomenon similarly, this demonstrates which reliability?

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

Answer: (B)

Reliability is about consistency of measurement. When two different observers rate the same phenomenon similarly, it shows inter-observer reliability. This means that different raters apply the measuring method in a consistent way, producing similar results rather than one observer’s judgment dominating. Intra-observer reliability would be about the same person rating it consistently across multiple times. Test-retest reliability looks at stability of the measurement over time with the same method, not across different observers. Construct validity is about whether the measure actually assesses the intended construct, not about agreement between raters.

Reliability is about consistency of measurement. When two different observers rate the same phenomenon similarly, it shows inter-observer reliability. This means that different raters apply the measuring method in a consistent way, producing similar results rather than one observer’s judgment dominating.

Intra-observer reliability would be about the same person rating it consistently across multiple times. Test-retest reliability looks at stability of the measurement over time with the same method, not across different observers. Construct validity is about whether the measure actually assesses the intended construct, not about agreement between raters.