The Function of Biphasic Sleep in Infants
University of Massachusetts, Amherst
100 participants
Sep 1, 2023
INTERVENTIONAL
Conditions
Summary
This study is designed to investigate developmental changes in naps and nap function on memory from 9 to 15 months of age. Memory is measured by a task in which the experimenter interacts with a toy and the measure of memory is whether the child imitates that action when given the toy. Sleep is assessed with a watch that detects motion which provides an estimate of sleep and a set of electrodes placed on the head that measures brain activity during sleep. Infants are recruited at 9 months and sleep and memory are measured again 3- and 6-months later. At each visit, memory is tested before and after a nap (either the morning or afternoon nap) and naps are recorded with the sleep electrodes.
Eligibility
Inclusion Criteria3
- 9 months at the time of enrollment
- normal birthweight (5.5 to 10 lbs) and gestational length (36-41 weeks)
- must be willing and able to return for testing in 3 and 6 months (e.g., no plans to move out of the area)
Exclusion Criteria8
- born premature (<36 weeks gestational age)
- receiving services due to developmental delays
- visual or motor disability
- score <85 on cognitive and language composite scales and/or <80 on the average of the two composites of the Bayley Scales of Infant Development Fourth Edition (BSID-IV) administered at the first session.
- Infants' motor development (gross and fine motor) will also be assessed using the BSID-IV, and an adjusted cutoff of 73 will be used to exclude infants with significant motor delays (given the motoric nature of the task).
- traveling beyond 1 time zone within 2 weeks prior to testing (phone screening)
- fever or symptoms of respiratory illness at the time of testing (phone screening)
- physical handicap that interferes with assessments (vision, hearing impairment; phone screening)
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Interventions
Naps are common but promoted by soothing, lying the infant down, and/or rocking and massaging
Wake is encouraged by keeping the infant upright, providing stimulation (e.g., reading books, handing toys)
Locations(1)
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NCT06399939