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Delaying School Start Time By One Hour Positively Affects Adolescents' Cognitive Performance

Date:
June 13, 2008
Source:
American Academy of Sleep Medicine
Summary:
Delaying an adolescent's school start time by one hour has a positive effect on his or her cognitive performance.

Delaying an adolescent's school start time by one hour has a positive effect on his or her cognitive performance, according to a research abstract that will be presented on June 12 at SLEEP 2008, the 22nd Annual Meeting of the Associated Professional Sleep Societies (APSS).

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The study, authored by Orna Tzischinsky, PhD, of Emek Yezreel College in Israel, focused on 47 eighth graders from two classes, who were divided into experimental and control groups for a two-week period. On week one, the experimental class began their school day one hour later than usual (at 8:30 a.m.), while the control class began at the regular time (7:30 a.m.). On week two, both classes began at 7:30 a.m. The subjects were asked to maintain their habitual sleep-wake pattern. Actigraphs were worn to monitor sleep-wake patterns. On the fifth day of each week, the students performed a cognitive test.

According to the results, during the first week, the experimental class woke up 51 minutes later on average than the control class, while during the second week, the experimental and the control class woke up at the same time. Bedtime and sleep efficiency remained the same during both weeks.

"The cognitive tests showed better performance with the experimental group in comparison to the control group on the first week," said Dr. Tzischinsky. "The results demonstrate that longer sleep duration positively affects cognitive functioning."

It is recommended that adolescents get nine hours of nightly sleep.


Story Source:

The above story is based on materials provided by American Academy of Sleep Medicine. Note: Materials may be edited for content and length.


Cite This Page:

American Academy of Sleep Medicine. "Delaying School Start Time By One Hour Positively Affects Adolescents' Cognitive Performance." ScienceDaily. ScienceDaily, 13 June 2008. <www.sciencedaily.com/releases/2008/06/080612070445.htm>.
American Academy of Sleep Medicine. (2008, June 13). Delaying School Start Time By One Hour Positively Affects Adolescents' Cognitive Performance. ScienceDaily. Retrieved November 23, 2014 from www.sciencedaily.com/releases/2008/06/080612070445.htm
American Academy of Sleep Medicine. "Delaying School Start Time By One Hour Positively Affects Adolescents' Cognitive Performance." ScienceDaily. www.sciencedaily.com/releases/2008/06/080612070445.htm (accessed November 23, 2014).

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