How is data quality assessed in field observations and what is observer bias?

How is data quality assessed in field observations and what is observer bias?

• A. Data quality is evaluated by reliability checks, interrater agreement, and triangulation.
• B. Reliability checks, interrater agreement, and triangulation; observer bias occurs when researcher expectations influence observations and recordings.
• C. Data quality is evaluated by sample size and power analysis.
• D. Data quality is determined solely by instrument calibration.

Answer: (B)