The test administrators were doctoral and masters students from the College of Public Health Science and Faculty of Psychology, Chulalongkorn University. All examiners were trained during three separate sessions at least 3 times prior to test administration with the children. The training scheme included a brief introduction to neurobehavioral tests, purpose of each test, and demonstration of proper test administration. During the second training session, the tester practiced the test with their colleagues. They were taught how to troubleshoot the test administration, and what they should say in response
to subject performance and questions during the test. For example, they were instructed not to indicate if an answer was “correct” or “wrong”, but instead to use phrases such as “go on”, “keep trying”, “try more” to encourage the child’s persistence with the test.