300
3 threats to accuracy and reliability?
What is Observer drift, Observer expectation and observer reactivity?
Observer drift: over time, observers sometimes alter, often unknowingly, the way they apply a MX system, unintended changes in the way data collected.
Observer expectation: knowledge about predicted or desired results, avoid by using naive observers.
Observer Reactivity: MX error caused by an observers awareness that others are evaluating data they report