I haven't done any research on this, but it might be like handedness—some are right-handed, some left-handed and some are ambidextrous.
I suspect reading forwards and backwards is more common than being ambidextrous (I've only met a couple of truly ambidextrous people but I've met many who can read in both directions), but I wouldn't be surprised if there were a genetic component.
Many children will write in both directions until they are taught that you are "supposed" to write in a particular direction.
I suspect reading forwards and backwards is more common than being ambidextrous (I've only met a couple of truly ambidextrous people but I've met many who can read in both directions), but I wouldn't be surprised if there were a genetic component.
Many children will write in both directions until they are taught that you are "supposed" to write in a particular direction.