Spells like "barbaric yell" -> graze meaning?

[skyhrg]

If a status spell like barbaric yell grazes an enemy, what does that mean/do? The combat log doesn't really tell me. Is it this - A hit does the full effect, and a graze just adds 1 round of status?

[Balkoth]

Yeah, it's half-as-effective.

[skyhrg]

Ok thanks