Objectives-The fall in the prevalence of left handedness with age has been attributed to either premature mortality or a cohort effect of forced dextrality.
Evidence for forced dextrality was sought to differentiate between these competing theories.
Design-6097 Edinburgh handedness inventories were used to calculate laterality quotients (LQ) with and without the questions relating to writing and drawing.
These questions might be expected to be most influenced by forced dextrality.
Setting-The study was performed in a small industrial town in Lancashire, UK.
Participants-Using the British family practitioner service where over 95% of the population are registered with a general practitioner a response rate of 82.17% was obtained with respect to the Edinburgh Inventory.
Questions about writing and drawing on the Edinburgh Inventory contributed to the positivity (right handedness) of the mean LQ, but equally across the ages.
When a negative LQ was used to define left handedness the prevalence of left handedness fell from 11.2% at age 15 to 4.4% at age 70.
Removal of the questions about writing and drawing caused the prevalence of left handedness to fall from 10.5% at age 15 to 4.95% at age 70.
Conclusions-Less than 20% of the fall in the prevalence of left handedness was accounted for by questions relating to writing and drawing. (...)
Mots-clés Pascal : Mortalité, Latéralité, Gauche, Choix forcé, Droit, Epidémiologie, Facteur risque, Prévalence, Homme, Etude comparative, Angleterre, Grande Bretagne, Royaume Uni, Europe
Mots-clés Pascal anglais : Mortality, Laterality, Left, Forced choice, Right, Epidemiology, Risk factor, Prevalence, Human, Comparative study, England, Great Britain, United Kingdom, Europe
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 98-0129178
Code Inist : 002B30A01A2. Création : 22/06/1998.