claymorez said:
Do you ever talk to yourself? Cause I do!...well I don't have full blown conversations with myself like I don't talk to voices that aren't there or hear voices that aren't there but I do talk to myself occasionally. For example I might practise by myself explaining something to a friend alone. Or I might commentate on my game play or shout along with the guy on screen to make my heroic charge seem more fun when I get slaughtered charging down the hill in LOTR BFME 2 or cut to pieces as I make my last heroic stand in DoW DC. I sometimes comment on something I do e.g. walk up the stairs realise I didn't mean to and then say as I remember where I was going "no I am going to (X)" to myself. Do you do the same/similar thing? and if so do you recon we are mad or normal?
talking to ourselves (refering to ourselves in second or third person, "Michael, you really have to eat better..." kind of thing) is a natural part of being human.
Part of the reason for this from a psychological perspective is the different spheres of the brain. For example, you have four parts of the brain that control various rationalizing skills. One is cognitive thought (this is a relatively weak part of the brain only able to focus on one task at a time - for example, my cognitive thought process is focused solely on writing this response, where as my uncognitive thought is taking in and processing my surroundings), your uncognitive thought (think of this as the "processes" on your computer. You have applications and processes. Normally, we only run a few applications at a time, but there can be dozens of processes running in the back ground. These things control a variety of "automatic" ideas and processes. We aren't talking about breathing. An example could be like the following: have you ever felt the urge to jump while standing on the edge of a cliff? No, you're not crazy. This is your "processor" relaying to your cognitive brain that jumping would be bad. As it presents it's arguments to the cognitive brain, the cognitive brain interprets the signals as an order to jump, when really it's a warning not to.) then you have the right and left hemispheres of the brain (one controls rationale, logic, mathematical skills, etc., the other controls creativity, speech, and expression.).
These various parts of the brain are actually seperate entities that communicate with eachother. This is why we often mentally hear ourselves say, "You should..." in our heads.
interestingly, a particular disorder called Alien Hand Syndrome is associated with Split Brain Syndrome (where the brain's lines of communication are split from another part of the brain). When this happens, one side of the brain (often the right, non-verbal side) cannot communicate with the verbal. This not only creates a lapse in certain thought processes, but it separates the control of the right and left body (you feel like you can't control your left hand, because a major part of your cognitive ability is found in your left brain. This can cause you to literally lose control of your left hand, although it should be noted that in reality, it's still under your control, it's just under the control of the right brain.) In its frustration, the right brain may throw what amounts to a tantrum and could even be so fed up that it attempts to kill the body. Oddly, although most incidences of split brain sydrome are recoverable (in fact, the syndrome was discovered by an experimental surgery where the subject healed after about a month), the most common "cure" to the frustrated right brain is to verbally speak what you're thinking (and thus what the left brain is thinking) to the right brain. You can even teach your right brain to respond in various ways (think, tap once for yes, tap twice for no).
In short, we really do speak to ourselves cause there really is more than "one of us" up there!
EDIT: Oh, and from a non-scientific view, I do it all the time too. Especially when I'm playing an epic video game. If I'm in a situation where I know I'll die, I scream, "FOR LOUISE!!!!"... but that's an inside joke for another time.