על פי המאמר של Usability 101 של נילסון 2012, מה לא נכון:

במאמר לא נטען שתמיד תהיה קבוצת אוכלוסיה שתקנה מוצרים לפי Utility?

על פי המאמר. ג' לא נכון. Get hold of some representative users, such as customers for an ecommerce site or employees for an intranet (in the latter case, they should work outside your department).

ציטוט מהמאמר: User testing is different from focus groups, which are a poor way of evaluating design usability. Focus groups have a place in market research, but to evaluate interaction designs you must closely observe individual users as they perform tasks with the user interface. Listening to what people say is misleading: you have to watch what they actually do.