Small Theory on player attitudes

Here's a little theory of mine:

A player who is loose tends to believe that other players have worse cards than what their bets reflect. A player who is tight tends to believe that other players have better cards than what they have.

Preflop, an overbet of the pot may cause a tight player may fold because he believes you have a very strong hand. A loose player will tend to believe that you are bluffing, and he'll play along with you. If that player catches even a low pair, he may now believe there is a legitimate chance to win the pot.