or rewards outside of the current relationship or exchange. CLalt provides a measure of stability rather than satisfaction. If people see no alternative and fear being alone more than being in the relationship, social exchange theory predicts they will stay. Modes of exchange According to Kelley and Thibaut, people engage in Behavioral Sequence, or a series of actions designed to achieve their goal. This is congruent with their assumption that human beings are rational. When people engage in these behavioral sequences, they are dependent to some extent on their relational partner. In order for behavioral sequences to lead to social exchange, two conditions must be achieved: "It must be oriented towards ends that can only be achieved through interaction with other persons, and it must seek to adapt means to further the achievement of these ends". The concept of reciprocity also derives from this pattern. The reciprocity principle refers to the mutual reinforcement by two parties of each other's actions. The process begins when at least one participant makes a "move", and if the other reciprocates, new rounds of exchange initiate. Once the process is in motion, each consequence can create a self-reinforcing cycle. Even though the norm of reciprocity may be a universally accepted principle, the degree to which people and cultures apply this concept varies. Power dependence relations Several definitions of power have been offered by exchange theorists. For instance, some theorists view power as distinct from exchanges, some view it as a kind of exchange and others believe power is a medium of exchange. However, the most useful definition of power is that proposed by Emerson, who developed a theory of power-dependence relations. According to this theory, the dependence a person has on another brings up the concept of power. Power differentiation affects social structures by causing inequalities between members of different groups, such as an individual having superiority over another. Power within the theory is governed by two variables : the structure of power in exchange networks and strategic use. Experimental data show that the position an actor occupies in a social exchange network determines relative dependence and therefore power. According to Thibaut and Kelley, there are two types of power: fate control and behavior control. Fate control is the ability to affect a partner's outcomes. Behavior control is the power to cause another's behavior to change by changing one's own behavior. Matrices People develop patterns