H o w    d o e s    i t    w o r k ?


All of the analyses in PostHistory happen at the level of message headers. This means that PostHistory has no idea of what is being said in any of the email messages it looks at; it only knows that people are talking to each other.

The application differentiates between the following headers:
    
- FROM
      - TO
      - CC
      - BCC


In order to visualize usage patterns in a simple manner, PostHistory has to interpret what these headers mean in terms of social network constructs as well as in terms of formal social structure. To that end, a set of heuristics had to be developed to figure out  things such as:
     - what determines a "direct" email message and how do we differentiate   
       that kind of message from a less direct one;
     - who knows whom in a personís email network;
     - what determines (and how do we measure) contact strength in a    
   
       personís email network.
     - how responsive is the user in relation to different people on his/her 
       email social network?


         
motivation and goal
    how is it done 
why social networksl?
visualizations

FERNANDA VIEGAS

SOCIABLE MEDIA GROUP

MIT MEDIA LABORATORY

COPYRIGHT © 2002 MIT Media Lab