What concept does 'data triangulation' refer to in assessment?

Data triangulation refers to the process of using multiple sources of data to draw valid conclusions about a student's needs. This approach is important in educational assessment because it helps to provide a more comprehensive understanding of a student's strengths, weaknesses, and overall learning profile. By integrating various types of data—such as standardized test scores, observational data, and qualitative assessments—educators can mitigate the limitations inherent in any single measure. This holistic view enhances decision-making processes for instructional strategies and interventions, leading to more tailored and effective support for each learner. The practice acknowledges that a singular point of data may not present the full picture and underscores the value of diverse evidence in educational decision-making.