Participants were tested twice, 2 weeks apart. Order of the original and alternate test form was counterbalanced and a different tester administered the two versions of the test for each child. All neurobehavioral tests were completed in a quiet classroom with one child tested at a time. In each test station, an examiner gave the child instructions. A trained examiner observed the child perform the practice tests to be certain the child understood the instructions and clarified instructions if the child did not perform the test correctly. The examiner also provided encouragement to maintain the child’s attention to the test. Each child had a 10 minute break between completion of the computerized tests and non-computerized tests. After the participant accomplished all neurobehavioral tests, the child received a small gift as a reward.