Both the trait theory and psychodynamic approach are subjective. The trait theory does not have a certain set of traits but rather a long list that a leader could have to influence individuals. Many researchers have tried to come up with lists of traits, but so far there has been no definite set of traits that defines a leader. The psychodynamic theory is subjective in that there is not much research to prove it credible. It is hard to prove that someone’s behavior is affected by their unconscious. Something that cannot be tested is much less credible.