Correlational Research is when a relationship between two variables is examined. While experiments use the manipulation of a variable to examine causation, correlations look at the already existing information of two variables that cannot be manipulated to see if there is a correlation.
Conclusion: The study explained in this clip is a correlational study conducted by Michael McCullogh at the University of Miami. In this study, the two variables examined were religion and self control. Neither religion nor self control can be manipulated, thus an experimental design is not possible and a correlation is conducted. This study examined the relationship between these two variables. Because the study is correlational, causation cannot be claimed, but further research can provide support for the type of relationship between these factors. This particular study claims that there is a positive correlation between the two where a stronger practice of religion leads to higher levels of self control.