Julia is likely experiencing prejudice or bias towards the person from Sri Lanka based on their nationality or ethnicity. Her nervousness and desire to change sections of the course suggest that she may have negative attitudes or stereotypes about people from Sri Lanka, even if she doesn't consciously believe she is prejudiced. This is an example of implicit bias, which refers to attitudes or beliefs that affect our behavior and decision-making without our conscious awareness or intention. To overcome implicit bias, it's important to recognize the ways in which our unconscious attitudes and beliefs can affect our behavior and actively work to challenge and change them.