Psychographics is the study of personality, values, opinions, attitudes, interests, and lifestyles. Because this area of research focuses on interests, attitudes, and opinions, psychographic factors are also called IAO variables. Psychographic studies of individuals or communities can be valuable in the fields of marketing, demographics, opinion research, prediction, and social research in general. They can be contrasted with demographic variables (such as age and gender), behavioral variables (such as usage rate or loyalty), and organizational demographics variables (sometimes called firmographic variables), such as industry, number of employees, and functional area.