Values are people's cognition, understanding, judgment or choice on the basis of certain thinking senses, that is, people's thinking or orientation of identifying things and distinguishing right from wrong, thus embodying certain values or functions of people, things and things; In class society, different classes have different values.
Values are characterized by stability and persistence, historicity and selectivity, and subjectivity. Values play a guiding role in motivation and reflect people's cognition and needs. The famous value research includes the value research of allport and others, Morris's lifestyle questionnaire and Rokic's value questionnaire.