Research regarding the Style Approach Theory is thought to have begun around the 1940s at Ohio State University and the University of Michigan that served to determine the most significant behaviors exhibited by leaders. One of the first identifications of the theory was that leadership is divided into task and relationship behaviors, which serves as the basis of the division between the two aspects of the theory. Later, in the 1960s, further studies were conducted by the pair Blake and Mouton that explored how managers used task vs. relationship behaviors in an organizational setting. Following this era, the Leadership (Managerial) Grid was created and encompassed the ideas of all three studies on a scale of production centered behaviors vs relationship-focused behaviors (Northouse 71-76).
Illinois Mathematics and Science Academy, "03. Style Approach" (2019). CORE. 15.