Talking in groups takes balance. If you're in a meeting with people, it can be hard to make your voice heard. If you talk too much, you could be viewed as bossy, self-centered, or trying to impress the boss. If you don't talk at all, you could be seen as disinterested, bored, or people might think you're better than the group. Also, workmates try and establish their rank or dominance by talking over you during a group meeting.
I find myself becoming more and more frustrated with group meetings. I don't speak too much because I don't like interrupting people, but this leads me with little room to talk. Sometimes discussions get on tangents that I have no idea what the group is talking about, and I eventually start thinking about other things. I'm a firm believer that everyone should get a chance to speak and everyone has an equal voice. I believe loud-mouth people need to shut up.
OK Mitch, what does this have to do with your blog? Well, for one, I think I needed a space to vent and to finally get a chance to speak! Also, being in groups that aren't fun seem like a waste of time. We need to be doing stuff that makes us happy and working towards our own Missions. I believe people talk excessively to fill up time. We fill up time when we aren't prepared, or when we are nervous. Why aren't we prepared? Because work life and real life are cluttered with a lot of pointless things.
I believe there's a lot of other psychological reasons people talk a lot, and I won't get into them here. I ask that if you're a group meeting and you feel like you're taking up a lot of time, give someone else the chance to speak.