beau99 wrote:
zendell wrote:
I'm not saying there's anything wrong with left-handedness. I looked it up out of curiosity and found that environmental factors are likely involved, it's increasing just like autism, and it's common in people with developmental disorders, autism, seizures, and learning disabilities.
Of course it's common.
Autism is extreme right-brain dominance. Lefties are right-brained naturally.
I think it's interesting that left-handedness is associated with autism because the prevalence of left-handedness is growing. Unlike autism, where we can't be 100% certain it's increasing (because less go undiagnosed now), left-handedness can be easily "diagnosed" so it's easy to see that it's increasing. If both are increasing, then it seems like autism can't have solely genetic causes.