Before engaging in a conversation, a message must be planned. While there are many ways to perform this task, I believe that people do this in the following way, in particular if the message is going to be long: first an outline is planned (global, or skeleton planning), which is then filled in with details (local planning, elaboration). Planning proceeds thus from general to specific (breadth
... [Show full abstract] first), that is, sentences are planned incremen- tally by gradual refinement of some abstract thought rather than in one go (one-shot process) where every element is planned down to its last details.