People prefer to say “yes” to individuals and organizations they know and like. Same goes for websites and other user interfaces.| Nielsen Norman Group
A perceived high-authority status of the person making a request can make people more compliant with that request. Applying this principle in UX can ease users' decision-making process.| Nielsen Norman Group
Feeling that there is only one chance can convince people to take action sooner, sometimes without careful consideration of consequences or alternative options.| Nielsen Norman Group