bookmark_borderCan I spell or can’t I?

In some ways, I’m pretty good at spelling. I rarely look up words, and words that I write are normally written correctly, so I normally disable spelling correction – there’s no point.

However, I sometimes write words that aren’t what I intended. Today, for instance, I wrote bath instead of bad, and I recently wrote at instead of and. Always correctly spelt words, just not the right ones, although they’re similar.

I believe I do it occasionally when I speak, too, although I don’t remember any examples.

What is this phenomenon called? Not dyslexia, I think. Does it have a name? Do other people do it, too?