I'm not sure, but I don't think so?? I think of Agnostics as people who are theologically neutral, with no firm feelings one way or the other. Where as Atheists are as firm in their disbelief of God as Christians are in their beliefs that He does exist as the Creator of man and the universe. I really don't believe Agnosticism is a bridge to Atheism, as it could just as well lead to a belief in another theology, IMO.... For whatever that's worth:)

If a theist becomes agnostic, they went from believing to not being sure.

If an atheist becomes agnostic, they went from not believing to not being sure.

It is a bridge, on one side is theism and on the other side there is atheism, like any bridge you can cross the bridge to either side, or just stay put on the bridge.

I think the very word agnosticism is a misnomer, as, when it comes down to it, most everyone is an agnostic. I'm an agnostic atheist: I do not believe in a god, but I do not know there is no god. Likewise, many, if not most, theists are also agnostic. They have faith, they have belief, but it is not an absolute psychological certainty. So, in that regard, I don't regard agnosticism as even a legitimate position.

However, in the sense of not believing anything, or unsure of what to believe, or being an apatheist, not caring, I don't necessarily think it's a bridge. I'd say that apatheists or nonbelievers are more apt to be or become atheists, however.

I'm sure for a lot of people, agnosticism (as it's colloquially understood^) is a step that comes after skepticism, usually due to critical thinking, but I feel from discussing this with others, that it is usually after investigation that they realise they are more Atheist, but this is an unfortunate term really as, generally one can not make outright absolutist claims and that's what most people think atheism is.

^ Agnosticism is actually the opposing view to gnosticism, it is not a belief middle ground

Most agnostics are atheists, they just won't admit it. Atheists don't believe in God, agnostics don't know whether he does or not. If you don't know if God exists, you don't believe in God.

Ergo, you are an atheist.

This is excluding gnostic atheists, a small minority of the atheist populace.

Not to give credence to all the smug atheists who like to pretend that everything is secretly a form of atheism, developmentally, I've heard it often is. But for many, myself included, it seems to take the shape of sort of a bell curve: you start out theistic, become agnostic, bridge to atheism, then revert back to agnosticism once you've gotten over your adolescent arrogance and angst over having had so little say in your spirituality during your formative years. It takes longer for some than for others.

Spiritually or scientifically, there's no basis to that claim.

It depends on the person. As do most things.

A lot of people claim to be agnostic, but lean one way more than another.

Not necessarily more towards Atheism. I personally am agnostic, but I lean more towards theism, just none of the gods that people have made up.

To each their own though.

It is just as much of a bridge to theism as it is to atheism.

Agnosticism is the only theological ideology that posits absolutely nothing, whether that is a direct claim (God exists/god does not exist) or a belief (I don't believe in a god/I do believe in a god).

It is the logically consistent middle ground. But it is only logically consistent because it neither makes a claim nor requires belief either way. It sounds like no fun at all.