Anxiety disorders are common mental disorders known to affect 18.1 percent of the adult population (according to the Anxiety and Depression Association of America). Though everyone experiences some level of anxiety in their life, studies show that individuals diagnosed with an anxiety disorder might actually perceive the world differently. Researchers at the Weizmann Institute of Science in Israel conducted an experiment to see how individuals with anxiety interpreted sensory information. The volunteer participants were played three sounds to represent losing money, gaining money, and no change. Later, they were played 15 sounds and asked if the sound was new or not. The results show that participants with anxiety were less able to distinguish between previously heard sounds and new ones which was also linked to responses in the amygdala, an area of the brain associated with fear and anxiety.
Link to research: http://www.cell.com/current-biology/fulltext/S0960-9822(16)00073-7