Including optional material in application

[goatman2743]

One of the schools I'm applying to gives the option of attaching a CV.  Anything I could put on a CV that I would want the program to know about me already appears somewhere else in the application, so I don't see much of an advantage in creating one.  That said, I'm worried that if I don't attach a CV it might signal to the program that I'm not interested or lazy or something.  Is this concern valid enough to create one anyway?

[Maleficent999]

I think of a CV as a place where they can see all the information they might want to know quickly. It's a summary, if you will. The information might be elsewhere but they might not want to search everywhere to figure out what publications you have or what relevant classes you've taken. They could, however, glance quickly at a CV to get this info so it could be helpful even if its a bit redundant.