That is, if \(C\) causes \(X\) and \(Z\) causes \(Y\), the \(X\) and \(Y\) will appear to be related . However, if we control for the effect of \(C\) (the method for doing this is beyond the scope of ...That is, if \(C\) causes \(X\) and \(Z\) causes \(Y\), the \(X\) and \(Y\) will appear to be related . However, if we control for the effect of \(C\) (the method for doing this is beyond the scope of this text), then the relation between \(X\) and \(Y\) will disappear.