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Treating insomnia includes challenging unrealistic beliefs that may contribute to anxieties and wakefulness. This study explored beliefs about the shape and continuity of healthy adult sleep at different adult ages.Younger (n=113, M=21.4 (2.4)) and older adults (n=110, M=72.3 (7.7)) depicted their concept of the normal sleep of both a healthy 18 and 65 year olds. Plots were drawn to show sleep depth...