ram750,
from some psch friends that i have spoke to these tests have not been proven to be conculsive. Your results can change vastly on different days. It is a easy method of quickly reducing applicant numbers. I would not lose hope, i know of a guy who failed the phyc test 2 times and passed well on the 3rd go. The other thing as far as the personality stuff is concerned , apparently consistancy in answering is a big key. They are looking for a pattern in the way you answer those Qs. The comapny that QF uses is SHL direct, you can do some Qs on the website
www.shldirect.com Good luck