You receive one point for every question that you answer correctly on the COOP. There is no penalty for incorrect answers, and each question, regardless of how difficult it is, is worth only point.
The points you earn, known as your raw score, are tallied and then converted to a scaled score according to a formula determined by test developers. Converting raw scores to scaled scores allows schools to compare a student's performance on one part of the exam with his or her performance on other parts that may have included a greater or lesser number of questions.
Finally, scaled scores are reported as percentile rank. Percentile rank shows where students stand in relationship to one another on various sections and on the test as a whole.