What Is a Computer Adaptive Test ?
In a computer-adaptive test (CAT), questions are selected while each individual takes the test. At the start of each multiple-choice section of the GMAT, you are presented a question of middle difficulty. As you answer each question, the computer scores that question and uses that information as well as your responses to any preceding questions and information about the test designed to determine which question to present next.
As long as you respond correctly to each question, questions of increased difficulty typically will be presented. When you enter incorrect responses, the computer typically will present you with questions of lesser difficulty. Your next question will be the one that best reflects both your previous performance and the requirements of the test design. This means that different test takers will be given different questions. The selection of ques-tions you will see is based on your responses to all previous questions, and because the CAT adjusts to your individual ability level, you will get few questions that are either too easy or too difficult for you.
Because the computer scores each question before selecting the next one, you must answer each question when it is presented. For this reason, once you answer a question and move on to another, you cannot go back and change your answer. The computer has already incorporated both your answer and the requirements of the test design into its selection of your next question.