These results are the first, albeit preliminary, comparative investigation of these measures. Replication, with increased sample size, is required to further investigate the properties of these measures. Sampling individuals from a wider range of age and health status groups would increase the clinical utility of these measures, as would demonstrating the ability of these measures to discriminate between patients with insomnia and those with other disorders of sleep. This study offers guidelines as to the optimal use of test scores from these measures to screen young adults suspected of insomnia.