COMM 3001 Lecture Notes - Lecture 4: Everything To Everyone, Multivariate Analysis, Spurious Relationship
16 May 2016
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The point of adding a control variable to a bivariate analysis is to establish that the effect we are seeing in the initial bivariate analysis is due to the independent variable, not something else. Without control variables, we cannot yet make a definitive statement about the effect of the independent variable on the dependent variable. First stop on the multivariate analysis train. Elaboration entails elaborating the original bivariate relationship between the independent variable and the dependent variable by introducing a third/control variable (z) Goal is to add more detail and increase the comprehension of our bivariate relationship by gathering more details about the interaction between our iv and dv. We"re seeing if other variables effect the relationship between our x & We observe the relationship between the independent and dependent variables after a third variable has been controlled. We do this by reconstructing the relationship between x and y for each value or score of z.
