The rep (aka: reputation) system here is quite simple.

Your rep bar shows overall how much reputation you have.

The more green your rep bar is, the more positive rep you have.

The more red your rep bar, the more negative rep you have.

The more positive rep you have, the more you influence other members reputation (up or down) when you positive or negative rep them.

The reputation system is a system used to determine one's reputation, or popularity, based on what other member's feelings on this site are of you, based on your posts, and other factors. Generally, a member with a green bar is over all well liked by most members, while someone with a red rep bar is generally disliked or disagreed with often.

When a person's reputation level is so low it reaches negative points, a message comes up on their posts stating, "Attitude Adjustment Needed."

Generally, a reputation is given to someone not just when you agree or disagree with their post (although that is what the rep box itself states), but when when someone posts something extraordinarily good, or extremely stupid.

To see who has rep'd you, click on User CP (User Control Panel). You will see which user has rep'd you, if it was a positive or negative rep, and the comment, if any, that they provided.

Here's how everything else works:

Default Reputation What reputation level shall new users receive upon registration? 10

Register Date Factor For every X number of days, users gain 1 point of reputation-altering power. 30

Post Count Factor For every X number of posts, users gain 1 point of reputation-altering power. 25

Reputation Point Factor For every X points of reputation, users gain 1 point of reputation-altering power. 500

Minimum Post Count How many posts must a user have before his reputation hits count on others? 50 Until a member reaches 50

posts, their reputation will be sent to another member as a bluish-grey color, whether they agree or disagree with the post. During this time the member also cannot influence the other member's reputation level until they've reached 50 posts.

Minimum Reputation Count How much reputation must a user have before his reputation hits count on others? 10

Daily Reputation Clicks Limit How many reputation clicks can a user give over each 24 hour period? Administrators are exempt from this limit. 3

Reputation User Spread How many different users must you give reputation to before you can hit the same person again? Administrators are exempt from this limit. 25