Assessments of occupation and productive prosition doesnt include information about a person's perceptions of their own class positions or subjective social class. But no consideration of social class is complete without accounting for the perceptions of individuals. For example, consider a person called Sam. Sam's neighbours consider him to be working class whereas Sam thinks he is middle class. Whose judgement would one use in this situation? One cant ignore Sam's ideas as they affect his behaviour. Although his beliefs may not coincide completely with his objective class position, they may affect his behaviour. So to understand social behaviour, one needs to know both the person's objective social class and his/her subjective class identfication. A major problem with this method is that it depends heavily on how the question about class is worded. Some individuals may rank themselves higher or lower than their income, occupation, poverty and lifestyle.