I didn't need a study to tell me this. I figured out that morality amounts to an appeal to authority, whether church or society. Ethics on the other hand, tries

I didn't need a study to tell me this. I figured out that morality amounts to an appeal to authority, whether church or society. Ethics on the other hand, tries to work things out from first principles. Higher cognitive abilities means having greater ability to work things out from first principles. I would expect the a similar study for ethics to show a positive correlation (or possibly bimodal distribution).