Assessment (Sessions 1-4) included all-night sleep recording to verify the complaint and to rule out insomnia secondary to sleep apnea, nocturnal myoclonus, and narcolepsy. In-depth interviews,conducted to explore possible sources of poor sleep, included evaluation of physical and mental tension, depression and low self-esteem, interpersonal, family or occupa-tional stresses, thoughts about sleep and the possibility of change, daytime eating and exercise habits, and physical environment variables.