She nods a little. If anyone could figure out that sort of thing, it'd be Raven. Her mind-powers are very amazing to Madoka, after all.

"Is there any way to notice that's happening..?" Madoka figures not, especially for a relatively normal girl like her, but it can't hurt to ask. "I-- I could keep an eye out too! Especially if we don't know why it'd be happening.."

And if it'd be happening for any malicious reason, they may all be in really big trouble.