I'm not actually looking at how to correct misspellings at this point, though I agree that the use of Bayasian filters for this makes a lot of sense and is a very cool use of perl.

My interest stems from my noticing that the frequency and range of the words I misspell increases dramatically when I am trying to write or type something I feel passionate about and/or have a large volume of information to convey.

It seems to me that my brain gets ahead my fingers abilities to type the stuff and I find that I will sometime contract two similar words, that may be several words apart in the sentence am trying to type, into a single word and completely omit the intervening words. Another common occurance in my own typing is when I make a typo in a word that I normally spell correctly, notice and go back to correct it and get a mental block about the spelling.

An example of this occured whilst type the word "passionate" above. I ommited one of the S's, and interchanged the I & O: "pasoinate". Whilst it was perfectly obvious to me that it was misspelt, for a few seconds, I simply could not see how to correct it. It required me to stop thinking about what I was going to type and concentrate specifically upon that word before I could see the correction.

I've been trying to think of a way of measuring this phenomena -- if that's what it is. I keep thinking about some sort of program to try and apply pressure to the subject typing (me:) and also some way to force me to try and type one pice of information whilst thinking about another, but I thought I might find some research and possibly some test methods out there somewhere, but they have escaped me so far.