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Laterality, hand control and scholastic performance: a British birth cohort study
Stockholm University, Faculty of Social Sciences, Stress Research Institute. (Biologisk psykologi och behandlingsforskning)
2012 (English)In: BMJ Open, ISSN 2044-6055, Vol. 2, no 2, e000314- p.Article in journal (Refereed) Published
Abstract [en]

Objectives: To use simple measures of laterality and hand control that can identify a greater risk of poorer scholastic ability, potentially signalling suboptimal hemispheric lateralisation.

Design: Analysis of material from a birth cohort study.

Setting: Members of the National Child Development Study, a British birth cohort study following people born in 1958.

Participants: 10 612 children who undertook tests at age 11 years.

Primary outcome measures: Teacher-administered tests of non-verbal general ability, verbal general ability, reading comprehension and mathematics. 

Results Linear regression produced associations (and 95% CIs) with tests of verbal general ability, non-verbal general ability, reading comprehension and mathematics scores for the lowest third (compared with highest) of a left-hand control test involving picking up matches of −1.21 (−1.73 to −0.68; p<0.001), −0.72 (−1.14 to −0.29; p=0.001), −0.70 (−1.06 to −0.35; p<0.001) and −1.32 (−1.90 to −0.73; p<0.001). Among those in the lowest third of the right-hand control test score, mixed-handedness compared with right-handedness was associated with poorer scholastic performance, with regression coefficients (and 95% CIs; p values) of 1.90 (−3.01 to −0.80; p=0.001), −1.25 (−2.15 to −0.35; p=0.007), −1.28 (2.04 to −0.53; p=0.001) and −1.33 (−2.53 to −0.13; p=0.030). The estimates are for a point change in the scholastic test scores, after adjustment for sex, left-hand motor function and social class. Statistically significant associations with mixed-handedness were only observed for the lowest third of right-hand motor function.

Conclusions Measures involving poorer left-hand motor function may represent useful markers of reduced cognitive function possibly reflecting suboptimal hemispheric lateralisation. Crude measures of laterality such as reported non-right-handedness may be more useful for research when combined with measures of motor function.                        

Place, publisher, year, edition, pages
2012. Vol. 2, no 2, e000314- p.
Keyword [en]
Job demands, Job control, Job strain, Work stress, Agreement
National Category
Other Medical Sciences
URN: urn:nbn:se:su:diva-82914DOI: 10.1136/bmjopen-2011-000314ISI: 000315042100005PubMedID: 22446987Local ID: P2939OAI: diva2:573297
Available from: 2012-11-30 Created: 2012-11-30 Last updated: 2013-08-30Bibliographically approved

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