Evaluation Reliability

The extent to which independent accessibility evaluations of the same content produce consistent results. High reliability means that different evaluators using the same method will identify similar sets of accessibility problems, while low reliability indicates that results depend heavily on who performs the evaluation. Reliability is a critical quality factor for accessibility evaluation methods because inconsistent results undermine confidence in audit findings and make it difficult to track accessibility progress over time. Methods that involve more subjective judgment (such as severity assessment) tend to have lower reliability than purely checklist-based approaches, though they may offer other advantages like higher correctness.