Reliability of selected tests from the neurobehavioral evaluation system.

NES is a widely used battery of tests designed for use in occupational health studies. Despite its widespread use, information on the reliability of the tests is limited. This article reviews the importance of test reliability and presents the results of analyses which were undertaken to examine the reliability of 11 tests and a mood rating scale contained in the NES. The NES tests were administered to 66 subjects on two testing days separated by a minimum of seven days. Seven tests were administered twice on each test day with a 3-hour interval between testing, and four of the tests were presented only once each test day. Test reliabilities were estimated for various summary measures for each test. Suggestions are made on the appropriate selection of tests and use of these.