Demographic variables are related to the specifics of a particular group of people
Demographic variables are related to the specifics of a particular group of people or a human population in general, as one might have guessed. These include such characteristics as age, gender, etc. For example, a particular group of people aged between 11 and 87 can be split into eight key categories, i.e., girls (aged 11–17), boys (aged 11–17), young men (aged 18–25), young women (aged 18–25), adult men (aged 26–50), adult women (aged 26–50), elderly women (aged 51–87) and elderly men (aged 51–87).
In their turn, social instructional variables are related to the social status or background of a particular person or a group of people, as Ellis, Harley and Walsh explain. To find a good example of social instructional variables for a sociological research, one may take a look at the people that work or study at literally any school. In each of these schools, there will be at least one person that represents the lower class (e.g., a janitor) and middle class (e.g., the majority of students and teachers). Even the upper class will be, probably, represented by some of the students whose parents have excelled in their business career. Likewise, the staff of any company can be taken into account to have a full list of class oriented variables (Maxfield & Babbie, 2011, p. 83).
