Score

"The lie score, which estimates the truthfulness of your answers, is crucial to determining whether you pass or fail the test. The answers you give to questions dealing with minor problems and failings add up to determine your lie score. Some questions will ask whether you ever get headaches, argue with your wife, tell lies, or think about committing a crime. Try to paint a believable picture of yourself with answers....You can even admit to having thought about committing a minor crime at one time or another, but never admit to having thought about doing a major crime, such as rape or robbery. If you admit to that, you'll find it counts heavily against you.

The lie score is often expressed as a percentage value. If you deny more than 25% of the minor points, psychologists assume that you are being deceptive. The higher percentage you get on the deception scale, the less likely that your other answers are truthful, according to the psychologists."

This is what Victor said.