
“Afternoon People” And “Nappers” Join Night Owls And Morning Larks As Researchers Identify New Sleep Chronotypes
Sleep researchers have long classified people as one of three types of sleepers: morning larks, night owls, or neither. Now, new research suggests these aren’t the only categories, adding “afternoon people” and “nappers” to the list of possible sleep chronotypes. “Variation in the diurnal curve of alertness-sleepiness cannot be fully accounted for [with] just three