Although it is known that children with sleep difficulties are likely to have school difficulties, new research reveals that this connection between sleep and school performance is related to a child's socioeconomic and ethnic/racial background. The study observed 166 8- and 9-year-old African-American and European-American children from a range of socioeconomic backgrounds. The findings showed that African-American children were at increased risk of cognitive difficulties when sleep was disrupted.
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