Which part of the evaluation triangle is described as essential for a valid evaluation?

The aspect of the evaluation triangle described as essential for a valid evaluation is evidence. Evidence refers to the data or information that supports the judgments made during the evaluation process. It is crucial because it provides the foundation on which conclusions are drawn about performance, competencies, or behaviors.

In an effective evaluation, evidence helps ensure that the results are objective, providing a clear basis for any decisions made regarding performance. Having robust evidence reduces biases and aids in establishing the credibility and reliability of the evaluation. It serves to back up claims about the performance level observed, facilitates fair assessments, and helps both evaluators and those being evaluated understand the rationale behind the judgments made.