Organizational behavior: a field of study that seeks to understand, explain, predict, and change human behavior, both individual and collective in the organizational context. Organizational behaviour is studied at three different levels, the individual level, the group level and the organization wide level. The roots of organizational behaviour emerged as a distinct field in the mid- 1940"s and is a discipline that has grown out of contributions from numerous earlier fields of study. Organization: groups of people who work independently toward some common purpose. Mintzberg discovered that managers are required to perform interpersonal, informational, and decisional functions that encompassed tasks related to the management of people as well as those related to the management of information, material and financial resources. Organizational behaviour is an applied behaviour science which means it is based on research that improves ones ability to understand, predict and influence others: improved managerial effectiveness and bottom line.