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Knapp’s Relationship Escalation Model
Initiation
This stage is very short, sometimes as short as 10-15 seconds. In this stage, interactants are concerned with making favorable impressions on each other. They may use standard greetings or observe each other’s appearance or mannerisms.
Experimenting
In the next stage, individuals ask questions of each other in order to gain information about them and decide if they wish to continue the relationship. “Many relationships progress no further than this point
Intensifying
Self-disclosure becomes more common in the intensifying stage. The relationship becomes less formal, the interactants begin to see each other as individuals, and statements are made about the level of commitment each has to the relationship.
Integrating
The individuals become a pair in the integrating stage. They begin to do things together and, importantly, others come to see them as a pair. A shared relational identity starts to form in this stage.
Bonding
During the bonding stage, a formal, sometimes legal, announcement of the relationship is made. Examples include a marriage, “best friend” ritual, or business partnership agreement. Few relationships reach this level

Duck’s Relationship Filtering Model
Sociological/Incidental Cues
Duck’s model is a set of filters through which we make choices about the level of relationship we wish to pursue with others. The first filter, socioligical/incidental cues, describes the constraints placed on our meeting people due to where we live or work. In other words, given our sociological location, there are some people we see a lot of and others we never meet.
Preinteraction Cues
Information we gain about people before we even interact with them leads us to exclude or include individuals with whom we wish to have a relationship. For instance, the appearance of some individuals will cause you to avoid or approach them.
Interaction Cues
As we begin to interact with others, we make judgments about whether to include or exclude them from possible relationships.
Cognitive Cues
At the deepest level, we make judgments about people based on their personality and the degree to which we think it will match ours. As others reach this level, we consider them “best friends.

Knapp’s Relationship Termination Model
Differentiating
In this stage, partners begin to stress the “me” instead of the “we.” In other words, the individuals begin to assert their independence. They may develop different hobbies or activities. The relationship may continue to dissolve, or this stage may be a warning sign that the couple needs to address their relationship status.
Circumscribing
Communication between the couple diminishes during this stage. They tend to avoid certain topics of discussion. Outwardly, the couple appears normal. At this stage, attempts can be made to discuss the relationship and return it to a positive state.
Stagnating
During the stagnating stage, the individuals avoid discussing the relationship because they think they know what the other will say. Others begin to take notice that something is wrong.
Avoiding
The pair begins to physically separate themselves during the avoiding stage. The individuals try to reduce the opportunities for discussion.
Terminating
This is the final stage of the relationship. Termination may come naturally, such as at the end of the semester when roommates move out, or arbitrarily, through divorce. Termination of the relationship can occur positively or negatively.

taken from:
http://www.abacon.com/commstudies/interpersonal/indevelop.html

The Developmental View
We have many different relationships with people. Some researchers say that our definition of interpersonal communication must account for these differences. These researchers say that interacting with a sales clerk in a store is different than the relationship we have with our friends and family members. Thus, some researchers have proposed an alternative way of defining interpersonal communication. This is called the developmental view. From this view, interpersonal communication is defined as communication that occurs between people who have known each other for some time. Importantly, these people view each other as unique individuals, not as people who are simply acting out social situations

Functions of Interpersonal Communication
Interpersonal communication is important because of the functions its achieves. Whenever we engage in communication with another person, we seek to gain information about them. We also give off information through a wide variety of verbal and nonverbal cues. Read more about the various functions of interpersonal communication and then complete the interactive activity and the quiz at the end of this unit

Gaining Information
One reason we engage in interpersonal communication is so that we can gain knowledge about another individual. Social Penetration Theory says that we attempt to gain information about others so that we can interact with them more effectively. We can better predict how they will think, feel, and act if we know who they are. We gain this information passively, by observing them; actively, by having others engage them; or interactively, by engaging them ourselves. Self-disclosure is often used to get information from another person.

Building a Context of Understanding
We also engage in interpersonal communication to help us better understand what someone says in a given context. The words we say can mean very different things depending on how they are said or in what context. Content Messages refer to the surface level meaning of a message. Relationship Messages refer to how a message is said. The two are sent simultaneously, but each affects the meaning assigned to the communication. Interpersonal communication helps us understand each other better.

Establishing Identity
Another reason we engage in interpersonal communication is to establish an identity. The roles we play in our relationships help us establish identity. So too does the face, the public self-image we present to others. Both roles and face are constructed based on how we interact with others.

Interpersonal Needs
Finally, we engage in interpersonal communication because we need to express and receive interpersonal needs. William Schutz2 has identified three such needs: inclusion, control, and affection.
-Inclusion is the need to establish identity with others.
-Control is the need to exercise leadership and prove one’s abilities. Groups provide outlets for this need. Some individuals do not want to be a leader. For them, groups provide the necessary control over aspects of their lives.
-Affection is the need to develop relationships with people. Groups are an excellent way to make friends and establish relationships.

taking from :
http://www.abacon.com/commstudies/interpersonal/interpersonal.html

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