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Handedness displays a complex inheritance pattern. For example, if both parents of a child are left-handed, there is a 26% chance of that child being left-handed. [23] A large study of twins from 25,732 families by Medland et al. (2006) indicates that the heritability of handedness is roughly 24%. [24]
A study done by the Department of Neurology at Keele University, North Staffordshire Royal Infirmary suggests that forced dextrality may be part of the reason that the percentage of left-handed people decreases with the higher age groups, both because the effects of pressures toward right-handedness are cumulative over time (hence increasing ...
Also, naturally left-handed musicians have to play with right-handed-only instruments (violin, viola, cello). Kurt Cobain, frontman of Nirvana, was naturally ambidextrous. He grew up having a slight preference for his left-hand (as can be seen in many of his childhood photographies), but as an adult he wrote right-handed.
Older Women Have More Left-Handed Babies. According to one Canadian study, women in their 30s and 40s were far more likely to have left-handed children than younger women. A study of 2,228 college ...
There has been a fair amount of research that associates left-handedness with the likelihood of psychotic disorders like schizophrenia. Skip to main content. 24/7 Help. For premium support please ...
An older study found that left-handed people were better at "divergent thinking", and a more recent research cites lefties have better working memories and mental flexibility. 5. Don't get too ...
This is often attributed to differences in "left-" and "right-" brained abilities. One factor that contributes support to the idea that there is a sex difference in brain lateralization is that men are more likely to be left-handed. However, it is unclear whether this is due to a difference in lateralization. [25]
The concept of "right-brained" or "left-brained" individuals is considered a widespread myth which oversimplifies the true nature of the brain's cerebral hemispheres (for a recent counter position, though, see below). Proof leading to the "mythbuster" of the left-/right-brained concept is increasing as more and more studies are brought to light.