Uncertainty reduction theory attempts to predict and explain rational development between two strangers.  It has two concerns, including self-awareness and knowledge of others.  Researcher Charles Berger noted that self-awareness varies among people and situation and so further breaks in down into two categories: objective self-awareness refers to the person's attention on the self rather than other objects while subjective self-awareness describes the blending of the self's position and experience.  There is also a need in interpersonal communication to get information about the other person because we do not like the uncertainty that persists between strangers.  Furthering this study, other researchers such as Michael Sunnafrank have suggested that the reason why people seek information is not to reduce the uncertainty, but to instead assess the potential outcome of the interaction, which leads into his predicted outcome theory (Littlejohn, 2002).