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Jacqueline MT Henderson,1 Neville M Blampied,1 Karyn G France2 1School of Psychology, Speech and Hearing, Te Kura Mahi ā-Hirikapo, College of Science, University of Canterbury, Te Whare Wānanga o Waitaha, Christchurch, New Zealand; 2School of Health Sciences, University of Canterbury, Te Whare Wānanga o Waitaha, Christchurch, New ZealandCorrespondence: Jacqueline MT HendersonSchool of Psychology, Speech and Hearing, Te Kura Mahi ā-Hirikapo, College of Science, University of Canterbury, Te Whare Wānanga o Waitaha, Private Bag 4800, Christchurch, New ZealandTel +64 33694358Email Jacki.henderson@canterbury.ac.nzBackground: An important developmental task for infants over their first few years of life is to learn to settle to sleep with a reasonably short latency, maintain sleep through the night and coordinate with family sleeping and waking schedules. A child who can reliably do this is exhibiting self-regulated sleep. Otherwise, children’s sleep may have to be other (non-self) regulated to some degree and they may exhibit pediatric sleep disturbances (e.g., extended sleep latency, and/or frequent nightwaking); these are reported by 36– 45% of parents of infants between ages four to 12 months.Purpose: To answer the question: Can infant and parent factors observed at 1 month of infant age predict which infants will have regulated sleep at 6- and 12-months of age? Prediction from 1 month has not previously been investigated.Methods: In a prospective longitudinal study, the mothers of 52 typically developing infants completed 6-day sleep diaries at 1, 3, 6, 9 and 12 months from which a composite sleep score (CSS) was derived for each child at each month. Diary reliability was assessed once (for 54% of families) using all-night videosomnography.Results: At 6 months, CSS scores were distributed bi-modally and thus differentiated into two groups by an empirically observed CSS cutoff score, with a majority (56%) of infants classified as self-sleep re