Inter-observer reliability is demonstrated when...

Inter-observer reliability is demonstrated when...

• A. Two or more researchers observe the same behaviour and compare results.
• B. A single researcher records data across time.
• C. Using a fixed coding scheme but no cross-check.
• D. Analyzing content only after data collection.

Answer: (A)

Inter-observer reliability is about how consistently different researchers observe and record the same behaviour. It is demonstrated when two or more researchers independently observe the same event and compare their results to see how much they agree. High agreement shows that the measurement or coding is reliable across observers, not just subjective to one person. Researchers typically train observers, calibrate them on a sample, and quantify agreement (like percent agreement or Cohen’s kappa) before coding the full dataset. The other options describe different ideas: one researcher recording data across time reflects intra-rater stability, not cross-observer reliability; using a fixed coding scheme without cross-check means reliability isn’t tested; analyzing content only after data collection relates to timing of analysis, not observer agreement.

Inter-observer reliability is about how consistently different researchers observe and record the same behaviour. It is demonstrated when two or more researchers independently observe the same event and compare their results to see how much they agree. High agreement shows that the measurement or coding is reliable across observers, not just subjective to one person. Researchers typically train observers, calibrate them on a sample, and quantify agreement (like percent agreement or Cohen’s kappa) before coding the full dataset. The other options describe different ideas: one researcher recording data across time reflects intra-rater stability, not cross-observer reliability; using a fixed coding scheme without cross-check means reliability isn’t tested; analyzing content only after data collection relates to timing of analysis, not observer agreement.