Actors Ellen Pompeo, Sandra Oh, Katherine Heigl, Justin Chambers, and T.R. Knight reprised their roles as surgical interns Meredith Grey, Cristina Yang, Izzie Stevens, Alex Karev, and George O'Malley, respectively, continuing their expansive storylines as focal points throughout the season.
From Wikipedia, the free encyclopedia. In psychology, trait theory (also called dispositional theory) is an approach to the study of human personality. Trait theorists are primarily interested in the measurement of traits, which can be defined as habitual patterns of behavior, thought, and emotion.n some theories and systems, traits are something a person either has or does not have, but in many others traits are dimensions such as extraversion vs. introversion, with each person rating somewhere along this spectrum.
Leadership trait theory says that there are defined personality traits that distinguish leaders from followers. In other words, leaders are different types of people from followers. Behavioural theories of leadership state that it is the behaviour of leaders that distinguishes them from their followers.eadership trait theory is one of the earliest theories of leadership, which can be traced back to Thomas Carlyleâs 1849 assertion that âthe history of the world was the biography of great menâ.