The functions of leadership are many and varied, depending upon the basic problem with a group must deal with, and the type of leadership style in action, which is dependent on the leaders basis of power. Power, in the case of leadership, is divided into six categories, however, each can be linked with another, as they are inter-related. Expert and Informational power are concerned with skills, knowledge and information, of which the holders of such abilities, are able to utilize, to influence others i.e. technicians and computer personnel. Reward and Coercive power, differ from the previously mentioned, as they involve the ability to either reward or punish persons being influenced, in order to gain compliance. Legitimate power, is power which has been confirmed by the very role structure of the group or organization itself, and is accepted by all as correct and without dispute, such as in the case of the armed forces or the police force. Referent power, on the other hand, involves those being influenced, identifying with the leader, i.e.. rock or film personalities using their image to enter the political arena.
Most leaders make use of a combination of these six types of power, depending on the leadership style used. Authoritarian leaders, for example, use a mixture of legitimate, coercive and reward powers, to dictate the policies, plans and activities of a group. In comparison, a democratic or participative leader would use mainly referent power, involving all members of the group in the decision-making process.
Leadership Theories
Leadership itself, has been accompanied throughout time, by numerous theories, all claiming to answer the question, Are leaders born or made? Those who accept the verdict, that leaders are born and not made, maintain,
"... that there are certain inborn qualities such as initiative, courage, intelligence and humour, which altogether pre-destine a man to be a leader ... the essential pattern is given at birth" (Adler, 1991, p. 4)
Trait Theory
Two leadership theories which concentrate on this point, are the Great man/great woman and the Trait theories. The great man/great woman theory, accordingly to Wrightsman, involves its followers believing that major events, both nationally and internationally, are influenced by those persons in power.
"A sudden act by a great man could, according to this theory, change the fate of the nation" (Wrightsman, 1977, p. 638)
The trait theory expands further on this conjecture, by concentrating on the personal characteristics of the leader. The theory, which until the mid-1940s formed the basis of most leadership research, cited traits believed to be characteristic of leaders, the list of which grew in length over the years, to include all manner of physical, personality and cognitive factors, including height, intelligence and communication skills. However, few traits emerged to conclusively differentiate leaders from non-leaders. The traits an individual has may, increase the probability that a person will become a leader, though whether such leadership is guaranteed, is uncertain. Nevertheless, it can be seen to be true that some people are more likely than others ...