TY - JOUR
T1 - Adolescent sleep and fluid intelligence performance
AU - Johnston, Anna
AU - Gradisar, Michael
AU - Dohnt, Hayley
AU - Billows, Michael
AU - McCappin, Stephanie
PY - 2010/7
Y1 - 2010/7
N2 - Fluid intelligence involves novel problem-solving and may be susceptible to poor sleep. This study examined relationships between adolescent sleep, fluid intelligence, and academic achievement. Participants were 217 adolescents (42% male) aged 13 to 18 years (mean age, 14.9 years; SD = 1.0) in grades 9-11. Fluid intelligence was predicted to mediate the relationship between adolescent sleep and academic achievement. Students completed online questionnaires of self-reported sleep, fluid intelligence (Letter Sets and Number Series), and self-reported grades. Total sleep time was not significantly related to fluid intelligence nor academic achievement (both P > 0.05); however, sleep difficulty (e.g. difficulty initiating sleep, unrefreshing sleep) was related to both (P < 0.05). The strength of the relationship between sleep difficulty and grades was reduced when fluid intelligence was introduced into the model; however, the z-score was not significant to confirm mediation. Nevertheless, fluid intelligence is a cognitive ability integral in academic achievement, and in this study has been shown it to be susceptible to sleep impairments (but not duration) in adolescents.
AB - Fluid intelligence involves novel problem-solving and may be susceptible to poor sleep. This study examined relationships between adolescent sleep, fluid intelligence, and academic achievement. Participants were 217 adolescents (42% male) aged 13 to 18 years (mean age, 14.9 years; SD = 1.0) in grades 9-11. Fluid intelligence was predicted to mediate the relationship between adolescent sleep and academic achievement. Students completed online questionnaires of self-reported sleep, fluid intelligence (Letter Sets and Number Series), and self-reported grades. Total sleep time was not significantly related to fluid intelligence nor academic achievement (both P > 0.05); however, sleep difficulty (e.g. difficulty initiating sleep, unrefreshing sleep) was related to both (P < 0.05). The strength of the relationship between sleep difficulty and grades was reduced when fluid intelligence was introduced into the model; however, the z-score was not significant to confirm mediation. Nevertheless, fluid intelligence is a cognitive ability integral in academic achievement, and in this study has been shown it to be susceptible to sleep impairments (but not duration) in adolescents.
KW - Academic achievement
KW - Adolescent sleep
KW - Fluid intelligence
KW - Sleep difficulty
UR - http://www.scopus.com/inward/record.url?scp=77955150318&partnerID=8YFLogxK
U2 - 10.1111/j.1479-8425.2010.00442.x
DO - 10.1111/j.1479-8425.2010.00442.x
M3 - Article
VL - 8
SP - 180
EP - 186
JO - Sleep and Biological Rhythms
JF - Sleep and Biological Rhythms
SN - 1446-9235
IS - 3
ER -