Separating the effects of ethnicity and socio-economic status on sleep practices of 6- to 7-month-old infants

Article

Tomalski, Przemyslaw, Moore, D., Ballieux, H., Kushnerenko, E., Johnson, Mark H. and Karmiloff-Smith, Annette 2016. Separating the effects of ethnicity and socio-economic status on sleep practices of 6- to 7-month-old infants. Learning and Individual Differences. 46, pp. 64-69. https://doi.org/10.1016/j.lindif.2015.12.028
AuthorsTomalski, Przemyslaw, Moore, D., Ballieux, H., Kushnerenko, E., Johnson, Mark H. and Karmiloff-Smith, Annette
Abstract

Infant sleep undergoes significant re-organization throughout the first 12 months of life,
with sleep quality having significant consequences for infant learning and cognitive
development. While there has been great interest in the neural basis and developmental
trajectories of infant sleep in general, relatively little is known about individual differences in
infant sleep and the socio-economic and cultural sources of that variability. We investigated this
using questionnaire sleep data in a large, unique multi-ethnic sample of 6-7 month-olds (n=174),
with families from South Asian ethnic groups in the UK (Indian, Pakistani and Bangladeshi)
being especially well represented. Consistent with previous data from less variable samples, no
effects of SES on sleep latency or nocturnal sleep duration emerged. However, perinatal risk
factors and ethnic differences did predict daytime sleep, sleep fragmentation and sleep-onset
time. While these results should be interpreted with caution due to several limitations, they likely
demonstrate that even when socio-economic status and ethnicity are much less confounded than
in previous studies, they have a surprisingly limited impact on individual differences in sleep
patterns in young infants.

KeywordsInfancy; Sleep; Ethnicity; SES; Bed-sharing
JournalLearning and Individual Differences
Journal citation46, pp. 64-69
ISSN1041-6080
Year2016
PublisherElsevier
Accepted author manuscript
License
CC BY-NC-ND
Digital Object Identifier (DOI)https://doi.org/10.1016/j.lindif.2015.12.028
Publication dates
Print06 Jan 2016
Publication process dates
Deposited14 Jan 2016
Accepted30 Dec 2015
FunderNuffield Foundation
Wellcome Trust
Medical Research Council
EU FP7 Marie Curie CIG
Copyright information© 2016 Elsevier
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