I still think that there are only four dimensions, three spatial and one temporal. The others are hypothetical.
I came here with kind of a question, and this seems about as good a place to post it as any.
I've been thinking about how to visualize multiple dimensions, and the following has occurred to me: "Dimension" is another word for "measurement". For instance "what are your dimensions?" And when trying to reconcile physical forces, physicists determine that in order to make it work there need to be additional dimensions - an additional variable assigned to each object.
It seems to me that these additional dimensions are additional measurements objects possess. There are not additional dimensions "out there". We, as objects, possess these additional dimensions. But they're measurements we have a hard time conceptualizing because they're things we don't typically perceive in ourselves or in other objects. I, as an object, have gravity. I have magnetism. I have radiation. I have a value that can be measured that you'd assign to each of these forces. And my measurements in these forces change as I move through time. And just as I move along the X, Y and Z axises, I also move through a gravity axis, and a magnetism axis, and a radiation axis. It seems to me that this is what must be meant when they say there are 11 dimensions, or whatever. The whole issue arises because they're trying to reconcile forces, and it's the forces, themselves, that provide the additional dimension.
And that doesn't mean there are parallel universes. Just because these values are variable doesn't mean that any one object possesses more than one value. It just means we're moving along other axises than the ones we normally perceive.