Originally Posted by
jaimelannister
Yeah, this is pretty accurate.
Human beings respond to different stimuli in different ways, but reward/punishment is generally the most effective, especially for a quick fix. You also have to understand that some human beings just don't care about being competitive, and therefore their motivation to improve at the game is near zero, especially if there are no consequences.
You can try explaining to them that there are 9 other people relying on their performance, and that in order to not let the rest of the group down, they need to step up. Problem here is if half the raid is under-performing (which seems to be the situation you describe), it is likely that each under-performing member thinks they are doing "just fine" and that it's that other guy's fault.
Have you tried calling people out by name? A little public humiliation can go a long way, and as the guild leader you can choose to do it with as little harshness as possible. For the DPS, do some research to determine what good average DPS numbers are for each fight and let people know how much they are behind by. Maybe you can shame them into performing better.