Question: What determines whether you get a good or evil dream in Baldur's Gate?

Baldur's Gate 1 had several dreams, and each of them (as far as I know) had two versions- one for good people and one for evil people. My question is, does anyone know what determines whether you get the good version or the evil version for each dream?

Is it your alignment, your reputation, or what?
If it's alignment then what do neutral people get? If it's reputation then what reputation is needed to get the good or evil dreams?

Thanks