Some misunderstandings are caused by ignorance of nonverbal communication cues. Other factors can also create barriers to effective communication. Stress or anxiety may interfere with understanding. When people are unsure what is expected or how they should act, they often become anxious. It is difficult for them to focus on communication. Nervous people may not hear what is being said. When anxiety causes them to misspeak,their lack of attention can lead to misunderstandings.