Our choice of colour, clothing, hairstyles, and other factors affecting appearance are also considered a means of nonverbal communication. Research on colour psychology has demonstrated that different colours can invoke different moods. Appearance can also alter physiological reactions, judgment, and interpretations. Just think of all the subtle judgement you quickly make about someone based on his or her appearance. These first impressions are important, which is why experts suggest that job seekers dress appropriately for interviews with potential employers.