What is a core rationale for triangulating data sources when reporting inconsistent performance?

• A. To reduce the number of data sources required
• B. To corroborate findings across multiple contexts
• C. To rely on the most favorable data
• D. To simplify interpretation to a single score

Answer: (B)

When performance appears inconsistent, using multiple data sources helps you verify whether the observed pattern is real or just a result of one particular context or measurement error. By collecting and comparing information from different contexts or methods—such as observations, curriculum-based measurements, and formal tests—you look for consistent patterns. If several independent data points align, you can trust that the finding reflects the student’s true performance, which supports more accurate decisions about supports and instruction. This approach also helps identify whether difficulties are situational or persistent, guiding targeted interventions.

Relying on a single data source would risk bias or misinterpretation, and aiming for the most favorable data would distort the picture. Reducing to a single score oversimplifies the student’s strengths and needs and misses important variability across contexts.