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Though there have been many formal definitions of leadership that did not include social influence and power, any discussion of leadership must inevitably deal with the means by which a leader gets the members of a group or organization to act and move in a particular direction. One of the most widely cited analyses of social power is that proposed by John R. P. French and Bertram H. Raven in 1959. They defined social influence as a change in the belief, attitude, or behavior of a person (the target of influence) which results from the action of another person (an influencing agent), and they defined social power as the potential for such influence, that is, the ability of the agent to bring about such a change using available resources. French and Raven identified five bases of power: coercive, reward, legitimate, expert, and referent. To this was later added a sixth: information power.

Defining the Bases of Power

The bases of power differ according to the manner in which social changes are implemented, the permanence of such changes, and the ways in which each basis of power is established and maintained. To illustrate these distinctions, we will examine a leadership situation involving the power of a supervisor who attempts to influence the behavior of a subordinate in a work situation.

Power That Leads To Socially Independent Change

One basis of power the supervisor might use is information power. The supervisor carefully explains to the subordinate how the job should be done differently, using persuasive reasons to explain why that would be a better and more effective procedure. The subordinate understands and accepts the reasons and changes his behavior. Information influence, then, brings about a cognitive change in and acceptance by the target. It is thus called “socially independent change” in that the target now continues the changed behavior without necessarily referring to, or even remembering, the supervisor as the agent of change.

Power That Results in Socially Dependent Change with Surveillance Necessary

Reward power stems from the ability of the agent to offer a positive incentive for the target to comply (for example, a raise in pay, a promotion, or special work privileges). An agent who uses coercive power brings about change by threatening a target who does not comply with undesirable consequences (for example, demotion, termination, or undesirable work assignments). In both reward power and coercive power, the influence is clearly socially dependent, since the target relates compliance to the actions of the agent (for example, “I did it because my supervisor offered me a reward if I complied”). Reward power and coercive power both from other bases of power in that not only are they socially dependent, but also because their effectiveness requires surveillance by the influencing agent: If reward and coercion are the only bases of power used by influencing agents, targets will comply only if they believe that the agents will be able to determine whether or not they complied. However, coercive power differs from reward power in the ease by which an agent may maintain surveillance. With reward power, it is to the advantage of targets to let agents know that they have complied; with coercive power, there may be a tendency for targets to hide the extent of their noncompliance, so that agents may require targets to demonstrate their compliance. There is also a tendency for the targets of coercive power to resent the threat of punishment, to resent feeling forced, and to have ill feelings toward the agent, as well as toward the behavior which they feel forced to accept. This is less likely to be true for reward power; indeed, the positive feelings associated with the reward may lead to a greater acceptance of the change and a greater liking for the influencing agent.

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