B3.19
Evaluator-Number Effects in Heuristic Evaluation
Cards in this group · 5
- B3.19.1A single evaluator finds only a small part of all problems, and individuals differ widely
- B3.19.2Total findings show diminishing returns as evaluators increase, often flattening after three to five people
- B3.19.3Diminishing-return estimates assume independent evaluators with equal detection probability, conditions rarely met
- B3.19.4Low overlap means the problem space is large and more evaluators are needed, not that quality is poor
- B3.19.5Evaluate independently before aggregating; prior discussion erases independence and distorts the number effect