Forum:How do charisma affect?

In: http://fallout.wikia.com/wiki/Charisma

The article says: "Charisma increases the disposition of all NPCs, which makes speech checks easier." But apparently only affects Barter and Speech.

Also says "NPC disposition towards player, Barter, Speech". Is 'NPC disposition towards player' diferent than barter & speech? What is the difference?

How charisma affects the speech checks? Because, if it only grows up barter and speech, it can do that on level up. I think there will be a more detailed explication about this (aparently worst) ability. VikingII 07:37, 16 April 2009 (UTC)