Today's job market is tough; it's dog-eat-dog, ruthless and competitive. Preparation is essential if you want to get the edge. As psychometric testing becomes standard for blue-chip companies to one-man bands this For Dummies guide could mean the difference between success and failure.

As the world of HR embraces psychometric testing, more and more people are faced with the daunting prospect of having to sit these mysterious exams. The tests have become the standard way in which employers judge abilities - your capacity to work with numbers, words and diagrams; your attainment - what you...