When we play tOSU on October 17th, we may be 6 and 0. If that's the case, then depending on how convincing the wins are and what other teams are doing Penn State could be ranked at high as 15 in one of the polls. If we lose to tOSU that week, and drop to 20 in the polls, then that would accurately be described as a correction. In that scenario, we really weren't good enough to be ranked 15, but after the loss to tOSU we dropped to where we should have been at that point.
This doesn't mean that I'm predicting that we'll be 6 and 0 coming into tOSU, or that we will lose to tOSU that week... both of these are highly possible though.