We often get calls from people who say they "passed the tests." However, there is no way to really "pass" the tests - that's because they're not tests in the same sense that people normally think of tests. The field sobriety tests are just evidence-gathering mechanisms for the police. The police note "clues" based on their observations when you are performing the SFSTs, but even if you do not exhibit any clues, you could still be arrested and you could still be intoxicated. Similarly, you coudl exhibit plenty of clues and be not intoxicated. The tests are merely based on statistical relations, and even if performed correctly, the statistical association with intoxication is not even close to 100%.The horizontal gaze nystagmus (HGN) test requires the officer to look at the movement in your eyes, and you can’t see what he sees. So at the very least, you will have no way to tell if you passed this test. The police also do not tell you what clues they are looking for when you take the other tests, and they may also lie to you about their thoughts on whether you passed. So if they tell you that you passed and still arrested you, they were likely just lying to you.In addition, the police might think you failed when you really didn’t. This happens when they conduct the test incorrectly - which happens all the time. Standardized tests are only valid when administered in the prescribed, standardized method. Imagine what it would be like if schools administered the same test for all their students, but some were administed in quiet classrooms, while others were administered with flashing bright lights in the room. You would naturally expect that the group of students in the quiet classroom would do better than the students in the classroom with the flashing bright lights.