I have read this article. I am not sure if I totally agree. I am 45 years old. I have always mirrored writed. I am ambidextrous, that is, I can write with both hands at the same time, for any direction (one right, other mirror writing, both mirror writing, both right,...), I can draw with both hands at the same time, doing different or equal things, you name it. yet, I have no dislexia, actually i never felt any problems in my studies (i am a professor of oceanography at a university), i feel quite confortable to learn different languages, I like to write, to paint, ..I like actually too many things :-) I have seen many comments about this that relate mirror writing with dislexia. To be honest, I am more convinced that it may be a genetic factor which does not necessarily mean that all mirror writers are dislexic.
But i surely would like to know the cause for being as I am, because I was never forced in school much less at home, to write with some particular hand.
Now i observe my son (just turned 6 years old), and I see him with some ambidextrous characteristics as well, and also tending to mirror write, although that, I am not sure he will do it at a later stage in his life. I am not pushing him for anything. I am just observing him and trying to figure out if he is a case like me. Because my parents have no idea why i do this, but my mother says that she has some idea that a cousin of mine is like that. So rather than thinking that leonardo d´vinci was one isolated case, I truly believe that there are a lot more like us out there.
If you read this and you are like that, please email me: anamartins@uac.pt.
thank you
ana