Behavioral Theory of leadership is a big leap from Trait Theory, as it was developed scientifically by conducting behaviour focused studies. The theory emphasizes that leadership capability can be learned, rather than being inherent. This theory is based on the principle that a leader's behaviors can be conditioned in a manner that one can have a specific response to specific stimuli.
University of Iowa Studies was the first leadership study to analyze leadership using scientific methodology. The study was conducted by Lewin, Lippitt, and White and worked on different styles of leadership. The studies explored three leadership styles - authoritarian, democratic, and laissez-fair leaders. This early study was very influential and established three major leadership styles.