The fact that the correlation is high, as indicated by the high value of r, just indicates the possibility of a relationship. In statistics and research, the phrases causation and correlation are frequently employed. Correlation is a link between two variables in which a change in one variable causes a change in the other. This does not, however, imply that one variable causes the other. The fact that the correlation is high, as indicated by the high value of r, just indicates the possibility of a relationship.