Based on data gathered from over 1,000 guys in 10 US cities, the A-Hole Tester calculates the probability that the guy you’re involved with is an A-Hole. Using the raw survey results and intel gathered for her book Are All Guys A**holes, author and relationship expert Amber Madison has created a formula that predicts whether or not you are dating a jerk. The A-Hole Tester uses 18 questions to determine your man’s A-Hole percentage, allows you to save and compare different guys’ scores, and offers advice based on your results.